diff --git a/lib/selectors/thread-selectors.js b/lib/selectors/thread-selectors.js
--- a/lib/selectors/thread-selectors.js
+++ b/lib/selectors/thread-selectors.js
@@ -53,7 +53,7 @@
 import {
   type ThreadInfo,
   type RawThreadInfo,
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
   type SidebarInfo,
   type RawThreadInfos,
 } from '../types/thread-types.js';
@@ -328,7 +328,7 @@
     (
       threadInfo: ?RawThreadInfo,
       members: $ReadOnlyArray<
-        RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+        LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
       >,
     ): boolean => {
       if (!threadInfo) {
diff --git a/lib/selectors/user-selectors.js b/lib/selectors/user-selectors.js
--- a/lib/selectors/user-selectors.js
+++ b/lib/selectors/user-selectors.js
@@ -17,7 +17,7 @@
 import { threadTypes } from '../types/thread-types-enum.js';
 import {
   type RawThreadInfo,
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
   type RawThreadInfos,
 } from '../types/thread-types.js';
 import type {
@@ -58,7 +58,7 @@
   threadInfo: ?RawThreadInfo,
   currentUserID: ?string,
   userInfos: UserInfos,
-): $ReadOnlyArray<RelativeMemberInfo> {
+): $ReadOnlyArray<LegacyRelativeMemberInfo> {
   const relativeMemberInfos = [];
   if (!threadInfo) {
     return relativeMemberInfos;
@@ -94,12 +94,12 @@
   return relativeMemberInfos;
 }
 
-const emptyArray: $ReadOnlyArray<RelativeMemberInfo> = [];
+const emptyArray: $ReadOnlyArray<LegacyRelativeMemberInfo> = [];
 
 // Includes current user at the start
 const baseRelativeMemberInfoSelectorForMembersOfThread: (
   threadID: ?string,
-) => (state: BaseAppState<>) => $ReadOnlyArray<RelativeMemberInfo> = (
+) => (state: BaseAppState<>) => $ReadOnlyArray<LegacyRelativeMemberInfo> = (
   threadID: ?string,
 ) => {
   if (!threadID) {
@@ -118,8 +118,9 @@
   threadID: ?string,
 ) => (
   state: BaseAppState<>,
-) => $ReadOnlyArray<RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo> =
-  _memoize(baseRelativeMemberInfoSelectorForMembersOfThread);
+) => $ReadOnlyArray<
+  LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+> = _memoize(baseRelativeMemberInfoSelectorForMembersOfThread);
 
 const userInfoSelectorForPotentialMembers: (state: BaseAppState<>) => {
   [id: string]: AccountUserInfo,
diff --git a/lib/shared/markdown.js b/lib/shared/markdown.js
--- a/lib/shared/markdown.js
+++ b/lib/shared/markdown.js
@@ -11,7 +11,7 @@
   MinimallyEncodedResolvedThreadInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
 import type {
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   ResolvedThreadInfo,
   ChatMentionCandidates,
 } from '../types/thread-types.js';
@@ -203,7 +203,7 @@
 
 function createMemberMapForUserMentions(
   members: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 ): $ReadOnlyMap<string, string> {
   const membersMap = new Map<string, string>();
diff --git a/lib/shared/mention-utils.js b/lib/shared/mention-utils.js
--- a/lib/shared/mention-utils.js
+++ b/lib/shared/mention-utils.js
@@ -12,7 +12,7 @@
 import { threadTypes } from '../types/thread-types-enum.js';
 import type {
   ThreadInfo,
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   ResolvedThreadInfo,
   ChatMentionCandidates,
 } from '../types/thread-types.js';
@@ -30,7 +30,7 @@
 
 type MentionTypeaheadUserSuggestionItem = {
   +type: 'user',
-  +userInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +userInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
 };
 
 type MentionTypeaheadChatSuggestionItem = {
@@ -110,7 +110,7 @@
 function getMentionTypeaheadUserSuggestions(
   userSearchIndex: SentencePrefixSearchIndex,
   threadMembers: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
   viewerID: ?string,
   usernamePrefix: string,
@@ -169,7 +169,9 @@
 function getUserMentionsCandidates(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   parentThreadInfo: ?ThreadInfo | ?MinimallyEncodedThreadInfo,
-): $ReadOnlyArray<RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo> {
+): $ReadOnlyArray<
+  LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+> {
   if (threadInfo.type !== threadTypes.SIDEBAR) {
     return threadInfo.members;
   }
diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -85,7 +85,7 @@
   type ThreadInfo,
   type MemberInfo,
   type ServerThreadInfo,
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
   type ThreadCurrentUserInfo,
   type RoleInfo,
   type ServerMemberInfo,
@@ -277,7 +277,7 @@
 
 function threadActualMembers(
   memberInfos: $ReadOnlyArray<
-    MemberInfo | RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    MemberInfo | LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 ): $ReadOnlyArray<string> {
   return memberInfos
@@ -286,7 +286,7 @@
 }
 
 function threadOtherMembers<
-  T: MemberInfo | RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  T: MemberInfo | LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
 >(memberInfos: $ReadOnlyArray<T>, viewerID: ?string): $ReadOnlyArray<T> {
   return memberInfos.filter(
     memberInfo => memberInfo.role && memberInfo.id !== viewerID,
@@ -529,7 +529,7 @@
 // Returns map from lowercase username to AccountUserInfo
 function memberLowercaseUsernameMap(
   members: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 ): Map<string, AccountUserInfo> {
   const memberMap = new Map<string, AccountUserInfo>();
@@ -948,7 +948,7 @@
 
   let threadMembers:
     | $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>
-    | $ReadOnlyArray<RelativeMemberInfo>;
+    | $ReadOnlyArray<LegacyRelativeMemberInfo>;
   let memberEntities: $ReadOnlyArray<UserEntity>;
   // Branching below is to appease flow
   if (threadInfo.minimallyEncoded) {
@@ -1130,7 +1130,7 @@
 
 function memberIsAdmin(
   memberInfo:
-    | RelativeMemberInfo
+    | LegacyRelativeMemberInfo
     | MemberInfo
     | MinimallyEncodedRelativeMemberInfo,
   threadInfo:
@@ -1148,7 +1148,7 @@
 // "parent admin" as anybody with CHANGE_ROLE permissions.
 function memberHasAdminPowers(
   memberInfo:
-    | RelativeMemberInfo
+    | LegacyRelativeMemberInfo
     | MemberInfo
     | ServerMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
@@ -1651,7 +1651,7 @@
 
 function removeMemberFromThread(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
-  memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   dispatchActionPromise: DispatchActionPromise,
   removeUserFromThreadServerCall: (
     input: RemoveUsersFromThreadInput,
@@ -1670,7 +1670,7 @@
 
 function switchMemberAdminRoleInThread(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
-  memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   isCurrentlyAdmin: boolean,
   dispatchActionPromise: DispatchActionPromise,
   changeUserRoleServerCall: (
@@ -1701,7 +1701,7 @@
 }
 
 function getAvailableThreadMemberActions(
-  memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   canEdit: ?boolean = true,
 ): $ReadOnlyArray<'change_role' | 'remove_user'> {
diff --git a/lib/types/minimally-encoded-thread-permissions-types.js b/lib/types/minimally-encoded-thread-permissions-types.js
--- a/lib/types/minimally-encoded-thread-permissions-types.js
+++ b/lib/types/minimally-encoded-thread-permissions-types.js
@@ -5,7 +5,7 @@
 import type {
   LegacyMemberInfo,
   RawThreadInfo,
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   LegacyRoleInfo,
   ThreadCurrentUserInfo,
   ThreadInfo,
@@ -102,7 +102,7 @@
 }>;
 
 const minimallyEncodeRelativeMemberInfo = (
-  relativeMemberInfo: RelativeMemberInfo,
+  relativeMemberInfo: LegacyRelativeMemberInfo,
 ): MinimallyEncodedRelativeMemberInfo => ({
   ...relativeMemberInfo,
   minimallyEncoded: true,
@@ -111,7 +111,7 @@
 
 const decodeMinimallyEncodedRelativeMemberInfo = (
   minimallyEncodedRelativeMemberInfo: MinimallyEncodedRelativeMemberInfo,
-): RelativeMemberInfo => {
+): LegacyRelativeMemberInfo => {
   const { minimallyEncoded, ...rest } = minimallyEncodedRelativeMemberInfo;
   return {
     ...rest,
diff --git a/lib/types/thread-types.js b/lib/types/thread-types.js
--- a/lib/types/thread-types.js
+++ b/lib/types/thread-types.js
@@ -56,12 +56,12 @@
 
 export type MemberInfo = LegacyMemberInfo | MinimallyEncodedMemberInfo;
 
-export type RelativeMemberInfo = $ReadOnly<{
+export type LegacyRelativeMemberInfo = $ReadOnly<{
   ...LegacyMemberInfo,
   +username: ?string,
   +isViewer: boolean,
 }>;
-const relativeMemberInfoValidator = tShape<RelativeMemberInfo>({
+const legacyRelativeMemberInfoValidator = tShape<LegacyRelativeMemberInfo>({
   ...legacyMemberInfoValidator.meta.props,
   username: t.maybe(t.String),
   isViewer: t.Boolean,
@@ -150,7 +150,7 @@
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
-  +members: $ReadOnlyArray<RelativeMemberInfo>,
+  +members: $ReadOnlyArray<LegacyRelativeMemberInfo>,
   +roles: { +[id: string]: LegacyRoleInfo },
   +currentUser: ThreadCurrentUserInfo,
   +sourceMessageID?: string,
@@ -169,7 +169,7 @@
   parentThreadID: t.maybe(tID),
   containingThreadID: t.maybe(tID),
   community: t.maybe(tID),
-  members: t.list(relativeMemberInfoValidator),
+  members: t.list(legacyRelativeMemberInfoValidator),
   roles: t.dict(tID, legacyRoleInfoValidator),
   currentUser: threadCurrentUserInfoValidator,
   sourceMessageID: t.maybe(tID),
@@ -189,7 +189,7 @@
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
-  +members: $ReadOnlyArray<RelativeMemberInfo>,
+  +members: $ReadOnlyArray<LegacyRelativeMemberInfo>,
   +roles: { +[id: string]: LegacyRoleInfo },
   +currentUser: ThreadCurrentUserInfo,
   +sourceMessageID?: string,
diff --git a/lib/utils/role-utils.js b/lib/utils/role-utils.js
--- a/lib/utils/role-utils.js
+++ b/lib/utils/role-utils.js
@@ -15,7 +15,7 @@
 } from '../types/thread-permission-types.js';
 import type {
   ThreadInfo,
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   RoleInfo,
 } from '../types/thread-types';
 import { threadTypes } from '../types/thread-types-enum.js';
@@ -62,7 +62,7 @@
 function useRolesFromCommunityThreadInfo(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   memberInfos: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 ): $ReadOnlyMap<string, ?RoleInfo> {
   // Our in-code system has chat-specific roles, while the
diff --git a/native/chat/chat-input-bar.react.js b/native/chat/chat-input-bar.react.js
--- a/native/chat/chat-input-bar.react.js
+++ b/native/chat/chat-input-bar.react.js
@@ -81,7 +81,7 @@
   ThreadInfo,
   ClientThreadJoinRequest,
   ThreadJoinPayload,
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   ChatMentionCandidates,
 } from 'lib/types/thread-types.js';
 import { type UserInfos } from 'lib/types/user-types.js';
@@ -300,7 +300,7 @@
   +inputState: ?InputState,
   +userSearchIndex: SentencePrefixSearchIndex,
   +userMentionsCandidates: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
   +chatMentionSearchIndex: SentencePrefixSearchIndex,
   +chatMentionCandidates: ChatMentionCandidates,
diff --git a/native/chat/settings/thread-settings-member-tooltip-modal.react.js b/native/chat/settings/thread-settings-member-tooltip-modal.react.js
--- a/native/chat/settings/thread-settings-member-tooltip-modal.react.js
+++ b/native/chat/settings/thread-settings-member-tooltip-modal.react.js
@@ -9,7 +9,10 @@
   MinimallyEncodedRelativeMemberInfo,
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { ThreadInfo, RelativeMemberInfo } from 'lib/types/thread-types.js';
+import type {
+  ThreadInfo,
+  LegacyRelativeMemberInfo,
+} from 'lib/types/thread-types.js';
 import { useDispatchActionPromise } from 'lib/utils/action-utils.js';
 
 import ThreadSettingsMemberTooltipButton from './thread-settings-member-tooltip-button.react.js';
@@ -25,7 +28,7 @@
 import Alert from '../../utils/alert.js';
 
 export type ThreadSettingsMemberTooltipModalParams = TooltipParams<{
-  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 }>;
 
diff --git a/native/chat/settings/thread-settings-member.react.js b/native/chat/settings/thread-settings-member.react.js
--- a/native/chat/settings/thread-settings-member.react.js
+++ b/native/chat/settings/thread-settings-member.react.js
@@ -25,7 +25,7 @@
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import {
   type ThreadInfo,
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
 } from 'lib/types/thread-types.js';
 import { useRolesFromCommunityThreadInfo } from 'lib/utils/role-utils.js';
 
@@ -93,7 +93,7 @@
 };
 
 type BaseProps = {
-  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +canEdit: boolean,
   +navigate: ThreadSettingsNavigate,
diff --git a/native/chat/settings/thread-settings.react.js b/native/chat/settings/thread-settings.react.js
--- a/native/chat/settings/thread-settings.react.js
+++ b/native/chat/settings/thread-settings.react.js
@@ -44,7 +44,7 @@
 import {
   type ThreadInfo,
   type ResolvedThreadInfo,
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
 } from 'lib/types/thread-types.js';
 import type { UserInfos } from 'lib/types/user-types.js';
 import {
@@ -210,7 +210,9 @@
   | {
       +itemType: 'member',
       +key: string,
-      +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+      +memberInfo:
+        | LegacyRelativeMemberInfo
+        | MinimallyEncodedRelativeMemberInfo,
       +threadInfo: ResolvedThreadInfo | MinimallyEncodedResolvedThreadInfo,
       +canEdit: boolean,
       +navigate: ThreadSettingsNavigate,
@@ -1142,7 +1144,7 @@
 const threadMembersChangeIsSaving = (
   state: AppState,
   threadMembers: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 ) => {
   for (const threadMember of threadMembers) {
diff --git a/native/markdown/rules.react.js b/native/markdown/rules.react.js
--- a/native/markdown/rules.react.js
+++ b/native/markdown/rules.react.js
@@ -12,7 +12,7 @@
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import type {
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   ThreadInfo,
   ChatMentionCandidates,
 } from 'lib/types/thread-types.js';
@@ -378,7 +378,7 @@
 
 function textMessageRules(
   members: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
   chatMentionCandidates: ChatMentionCandidates,
   useDarkStyle: boolean,
diff --git a/native/roles/change-roles-screen.react.js b/native/roles/change-roles-screen.react.js
--- a/native/roles/change-roles-screen.react.js
+++ b/native/roles/change-roles-screen.react.js
@@ -16,7 +16,10 @@
   MinimallyEncodedRelativeMemberInfo,
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { RelativeMemberInfo, ThreadInfo } from 'lib/types/thread-types.js';
+import type {
+  LegacyRelativeMemberInfo,
+  ThreadInfo,
+} from 'lib/types/thread-types.js';
 import { values } from 'lib/utils/objects.js';
 
 import ChangeRolesHeaderRightButton from './change-roles-header-right-button.react.js';
@@ -29,7 +32,7 @@
 
 export type ChangeRolesScreenParams = {
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
-  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +role: ?string,
 };
 
diff --git a/web/input/input-state.js b/web/input/input-state.js
--- a/web/input/input-state.js
+++ b/web/input/input-state.js
@@ -15,7 +15,7 @@
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import type {
   ThreadInfo,
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   ChatMentionCandidates,
 } from 'lib/types/thread-types.js';
 
@@ -52,7 +52,7 @@
   +canBeVisible: boolean,
   +keepUpdatingThreadMembers: boolean,
   +frozenUserMentionsCandidates: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
   +frozenChatMentionsCandidates: ChatMentionCandidates,
   +moveChoiceUp: ?() => void,
diff --git a/web/markdown/rules.react.js b/web/markdown/rules.react.js
--- a/web/markdown/rules.react.js
+++ b/web/markdown/rules.react.js
@@ -11,7 +11,7 @@
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import type {
-  RelativeMemberInfo,
+  LegacyRelativeMemberInfo,
   ThreadInfo,
   ChatMentionCandidates,
 } from 'lib/types/thread-types.js';
@@ -184,7 +184,7 @@
 
 function textMessageRules(
   members: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
   chatMentionCandidates: ChatMentionCandidates,
   useDarkStyle: boolean,
diff --git a/web/modals/threads/create/steps/subchannel-members-list.react.js b/web/modals/threads/create/steps/subchannel-members-list.react.js
--- a/web/modals/threads/create/steps/subchannel-members-list.react.js
+++ b/web/modals/threads/create/steps/subchannel-members-list.react.js
@@ -8,7 +8,10 @@
   MinimallyEncodedRelativeMemberInfo,
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { RelativeMemberInfo, ThreadInfo } from 'lib/types/thread-types.js';
+import type {
+  LegacyRelativeMemberInfo,
+  ThreadInfo,
+} from 'lib/types/thread-types.js';
 import type { UserListItem } from 'lib/types/user-types.js';
 
 import { useSelector } from '../../../../redux/redux-utils.js';
@@ -45,7 +48,7 @@
   const filterOutParentMembersWithENSNames = React.useCallback(
     (
       members: $ReadOnlyArray<
-        RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+        LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
       >,
     ) =>
       members
@@ -70,7 +73,7 @@
   const filterOutOtherMembersWithENSNames = React.useCallback(
     (
       members: $ReadOnlyArray<
-        RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+        LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
       >,
     ) =>
       members
diff --git a/web/modals/threads/members/change-member-role-modal.react.js b/web/modals/threads/members/change-member-role-modal.react.js
--- a/web/modals/threads/members/change-member-role-modal.react.js
+++ b/web/modals/threads/members/change-member-role-modal.react.js
@@ -15,7 +15,10 @@
   MinimallyEncodedRelativeMemberInfo,
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { RelativeMemberInfo, ThreadInfo } from 'lib/types/thread-types';
+import type {
+  LegacyRelativeMemberInfo,
+  ThreadInfo,
+} from 'lib/types/thread-types';
 import { useDispatchActionPromise } from 'lib/utils/action-utils.js';
 import { values } from 'lib/utils/objects.js';
 
@@ -28,7 +31,7 @@
 import UnsavedChangesModal from '../../unsaved-changes-modal.react.js';
 
 type ChangeMemberRoleModalProps = {
-  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 };
 
diff --git a/web/modals/threads/members/member.react.js b/web/modals/threads/members/member.react.js
--- a/web/modals/threads/members/member.react.js
+++ b/web/modals/threads/members/member.react.js
@@ -16,7 +16,7 @@
   MinimallyEncodedThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import {
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
   type ThreadInfo,
 } from 'lib/types/thread-types.js';
 import { useDispatchActionPromise } from 'lib/utils/action-utils.js';
@@ -34,7 +34,7 @@
 const commIconComponent = <CommIcon size={18} icon="user-edit" />;
 
 type Props = {
-  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +setOpenMenu: SetState<?string>,
 };
diff --git a/web/modals/threads/members/members-list.react.js b/web/modals/threads/members/members-list.react.js
--- a/web/modals/threads/members/members-list.react.js
+++ b/web/modals/threads/members/members-list.react.js
@@ -13,7 +13,7 @@
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import {
   type ThreadInfo,
-  type RelativeMemberInfo,
+  type LegacyRelativeMemberInfo,
 } from 'lib/types/thread-types.js';
 
 import ThreadMember from './member.react.js';
@@ -22,7 +22,7 @@
 type Props = {
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +threadMembers: $ReadOnlyArray<
-    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   >,
 };
 
@@ -50,7 +50,9 @@
             .sort((a, b) => stringForUser(a).localeCompare(stringForUser(b)))
             .map(
               (
-                user: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+                user:
+                  | LegacyRelativeMemberInfo
+                  | MinimallyEncodedRelativeMemberInfo,
               ) => (
                 <ThreadMember
                   key={user.id}
diff --git a/web/modals/threads/members/members-modal.react.js b/web/modals/threads/members/members-modal.react.js
--- a/web/modals/threads/members/members-modal.react.js
+++ b/web/modals/threads/members/members-modal.react.js
@@ -11,7 +11,7 @@
 } from 'lib/shared/thread-utils.js';
 import type { MinimallyEncodedRelativeMemberInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
-import { type RelativeMemberInfo } from 'lib/types/thread-types.js';
+import { type LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import { useRolesFromCommunityThreadInfo } from 'lib/utils/role-utils.js';
 
 import { AddMembersModal } from './add-members-modal.react.js';
@@ -43,8 +43,9 @@
   const allMembers = React.useMemo(
     () =>
       threadMembersNotFiltered.filter(
-        (member: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo) =>
-          searchText.length === 0 || userIDs.includes(member.id),
+        (
+          member: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+        ) => searchText.length === 0 || userIDs.includes(member.id),
       ),
     [searchText.length, threadMembersNotFiltered, userIDs],
   );
@@ -53,8 +54,9 @@
   const adminMembers = React.useMemo(
     () =>
       allMembers.filter(
-        (member: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo) =>
-          roleIsAdminRole(roles.get(member.id)),
+        (
+          member: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+        ) => roleIsAdminRole(roles.get(member.id)),
       ),
     [allMembers, roles],
   );