diff --git a/keyserver/src/push/crypto.js b/keyserver/src/push/crypto.js
index f59eec852..d2bc7edb5 100644
--- a/keyserver/src/push/crypto.js
+++ b/keyserver/src/push/crypto.js
@@ -1,318 +1,312 @@
 // @flow
 
 import apn from '@parse/node-apn';
 import invariant from 'invariant';
 import _cloneDeep from 'lodash/fp/cloneDeep.js';
 
-import { NEXT_CODE_VERSION } from 'lib/shared/version-utils.js';
-
 import type {
   AndroidNotification,
   AndroidNotificationPayload,
   AndroidNotificationRescind,
   NotificationTargetDevice,
 } from './types.js';
 import { encryptAndUpdateOlmSession } from '../updaters/olm-session-updater.js';
 
 async function encryptIOSNotification(
   cookieID: string,
   notification: apn.Notification,
   codeVersion?: ?number,
   notificationSizeValidator?: apn.Notification => boolean,
 ): Promise<{ +notification: apn.Notification, +payloadSizeExceeded: boolean }> {
   invariant(
     !notification.collapseId,
     'Collapsible notifications encryption currently not implemented',
   );
 
   const encryptedNotification = new apn.Notification();
 
   encryptedNotification.id = notification.id;
   encryptedNotification.payload.id = notification.id;
   encryptedNotification.topic = notification.topic;
   encryptedNotification.sound = notification.aps.sound;
   encryptedNotification.pushType = 'alert';
   encryptedNotification.mutableContent = true;
 
   const { id, ...payloadSansId } = notification.payload;
   const unencryptedPayload = {
     ...payloadSansId,
     badge: notification.aps.badge.toString(),
     merged: notification.body,
   };
 
   try {
     const unencryptedSerializedPayload = JSON.stringify(unencryptedPayload);
 
     let dbPersistCondition;
     if (notificationSizeValidator) {
       dbPersistCondition = ({ serializedPayload }) => {
         const notifCopy = _cloneDeep(encryptedNotification);
         notifCopy.payload.encryptedPayload = serializedPayload.body;
         return notificationSizeValidator(notifCopy);
       };
     }
     const {
       encryptedMessages: { serializedPayload },
       dbPersistConditionViolated,
     } = await encryptAndUpdateOlmSession(
       cookieID,
       'notifications',
       {
         serializedPayload: unencryptedSerializedPayload,
       },
       dbPersistCondition,
     );
 
     encryptedNotification.payload.encryptedPayload = serializedPayload.body;
 
-    if (
-      codeVersion &&
-      codeVersion >= NEXT_CODE_VERSION &&
-      codeVersion % 2 === 0
-    ) {
+    if (codeVersion && codeVersion >= 254 && codeVersion % 2 === 0) {
       encryptedNotification.aps = {
         alert: { body: 'ENCRYPTED' },
         ...encryptedNotification.aps,
       };
     }
 
     return {
       notification: encryptedNotification,
       payloadSizeExceeded: !!dbPersistConditionViolated,
     };
   } catch (e) {
     console.log('Notification encryption failed: ' + e);
 
     encryptedNotification.body = notification.body;
     encryptedNotification.threadId = notification.payload.threadID;
     invariant(
       typeof notification.aps.badge === 'number',
       'Unencrypted notification must have badge as a number',
     );
     encryptedNotification.badge = notification.aps.badge;
 
     encryptedNotification.payload = {
       ...encryptedNotification.payload,
       ...notification.payload,
       encryptionFailed: 1,
     };
     return {
       notification: encryptedNotification,
       payloadSizeExceeded: notificationSizeValidator
         ? notificationSizeValidator(_cloneDeep(encryptedNotification))
         : false,
     };
   }
 }
 
 async function encryptAndroidNotificationPayload<T>(
   cookieID: string,
   unencryptedPayload: T,
   payloadSizeValidator?: (T | { +encryptedPayload: string }) => boolean,
 ): Promise<{
   +resultPayload: T | { +encryptedPayload: string },
   +payloadSizeExceeded: boolean,
 }> {
   try {
     const unencryptedSerializedPayload = JSON.stringify(unencryptedPayload);
     if (!unencryptedSerializedPayload) {
       return {
         resultPayload: unencryptedPayload,
         payloadSizeExceeded: payloadSizeValidator
           ? payloadSizeValidator(unencryptedPayload)
           : false,
       };
     }
 
     let dbPersistCondition;
     if (payloadSizeValidator) {
       dbPersistCondition = ({ serializedPayload }) =>
         payloadSizeValidator({ encryptedPayload: serializedPayload.body });
     }
 
     const {
       encryptedMessages: { serializedPayload },
       dbPersistConditionViolated,
     } = await encryptAndUpdateOlmSession(
       cookieID,
       'notifications',
       {
         serializedPayload: unencryptedSerializedPayload,
       },
       dbPersistCondition,
     );
     return {
       resultPayload: { encryptedPayload: serializedPayload.body },
       payloadSizeExceeded: !!dbPersistConditionViolated,
     };
   } catch (e) {
     console.log('Notification encryption failed: ' + e);
     const resultPayload = {
       encryptionFailed: '1',
       ...unencryptedPayload,
     };
     return {
       resultPayload,
       payloadSizeExceeded: payloadSizeValidator
         ? payloadSizeValidator(resultPayload)
         : false,
     };
   }
 }
 
 async function encryptAndroidNotification(
   cookieID: string,
   notification: AndroidNotification,
   notificationSizeValidator?: AndroidNotification => boolean,
 ): Promise<{
   +notification: AndroidNotification,
   +payloadSizeExceeded: boolean,
 }> {
   const { id, badgeOnly, ...unencryptedPayload } = notification.data;
   let payloadSizeValidator;
   if (notificationSizeValidator) {
     payloadSizeValidator = (
       payload: AndroidNotificationPayload | { +encryptedPayload: string },
     ) => {
       return notificationSizeValidator({ data: { id, badgeOnly, ...payload } });
     };
   }
   const { resultPayload, payloadSizeExceeded } =
     await encryptAndroidNotificationPayload(
       cookieID,
       unencryptedPayload,
       payloadSizeValidator,
     );
   return {
     notification: {
       data: {
         id,
         badgeOnly,
         ...resultPayload,
       },
     },
     payloadSizeExceeded,
   };
 }
 
 async function encryptAndroidNotificationRescind(
   cookieID: string,
   notification: AndroidNotificationRescind,
 ): Promise<AndroidNotificationRescind> {
   // We don't validate payload size for rescind
   // since they are expected to be small and
   // never exceed any FCM limit
   const { resultPayload } = await encryptAndroidNotificationPayload(
     cookieID,
     notification.data,
   );
   return {
     data: resultPayload,
   };
 }
 
 function prepareEncryptedIOSNotifications(
   devices: $ReadOnlyArray<NotificationTargetDevice>,
   notification: apn.Notification,
   codeVersion?: ?number,
   notificationSizeValidator?: apn.Notification => boolean,
 ): Promise<
   $ReadOnlyArray<{
     +cookieID: string,
     +deviceToken: string,
     +notification: apn.Notification,
     +payloadSizeExceeded: boolean,
   }>,
 > {
   const notificationPromises = devices.map(
     async ({ cookieID, deviceToken }) => {
       const notif = await encryptIOSNotification(
         cookieID,
         notification,
         codeVersion,
         notificationSizeValidator,
       );
       return { cookieID, deviceToken, ...notif };
     },
   );
   return Promise.all(notificationPromises);
 }
 
 function prepareEncryptedIOSNotificationRescind(
   devices: $ReadOnlyArray<NotificationTargetDevice>,
   notification: apn.Notification,
   codeVersion?: ?number,
 ): Promise<
   $ReadOnlyArray<{
     +cookieID: string,
     +deviceToken: string,
     +notification: apn.Notification,
   }>,
 > {
   const notificationPromises = devices.map(
     async ({ deviceToken, cookieID }) => {
       const { notification: notif } = await encryptIOSNotification(
         cookieID,
         notification,
         codeVersion,
       );
       return { deviceToken, cookieID, notification: notif };
     },
   );
   return Promise.all(notificationPromises);
 }
 
 function prepareEncryptedAndroidNotifications(
   devices: $ReadOnlyArray<NotificationTargetDevice>,
   notification: AndroidNotification,
   notificationSizeValidator?: (notification: AndroidNotification) => boolean,
 ): Promise<
   $ReadOnlyArray<{
     +cookieID: string,
     +deviceToken: string,
     +notification: AndroidNotification,
     +payloadSizeExceeded: boolean,
   }>,
 > {
   const notificationPromises = devices.map(
     async ({ deviceToken, cookieID }) => {
       const notif = await encryptAndroidNotification(
         cookieID,
         notification,
         notificationSizeValidator,
       );
       return { deviceToken, cookieID, ...notif };
     },
   );
   return Promise.all(notificationPromises);
 }
 
 function prepareEncryptedAndroidNotificationRescinds(
   devices: $ReadOnlyArray<NotificationTargetDevice>,
   notification: AndroidNotificationRescind,
 ): Promise<
   $ReadOnlyArray<{
     +cookieID: string,
     +deviceToken: string,
     +notification: AndroidNotificationRescind,
   }>,
 > {
   const notificationPromises = devices.map(
     async ({ deviceToken, cookieID }) => {
       const notif = await encryptAndroidNotificationRescind(
         cookieID,
         notification,
       );
       return { deviceToken, cookieID, notification: notif };
     },
   );
   return Promise.all(notificationPromises);
 }
 
 export {
   prepareEncryptedIOSNotifications,
   prepareEncryptedIOSNotificationRescind,
   prepareEncryptedAndroidNotifications,
   prepareEncryptedAndroidNotificationRescinds,
 };
diff --git a/lib/shared/messages/change-role-message-spec.js b/lib/shared/messages/change-role-message-spec.js
index 3fd25db65..76cc799af 100644
--- a/lib/shared/messages/change-role-message-spec.js
+++ b/lib/shared/messages/change-role-message-spec.js
@@ -1,232 +1,232 @@
 // @flow
 
 import invariant from 'invariant';
 
 import {
   pushTypes,
   type CreateMessageInfoParams,
   type MessageSpec,
   type RobotextParams,
 } from './message-spec.js';
 import { joinResult } from './utils.js';
 import type { PlatformDetails } from '../../types/device-types.js';
 import { messageTypes } from '../../types/message-types-enum.js';
 import type {
   MessageInfo,
   ClientDBMessageInfo,
 } from '../../types/message-types.js';
 import {
   type ChangeRoleMessageData,
   type ChangeRoleMessageInfo,
   type RawChangeRoleMessageInfo,
   rawChangeRoleMessageInfoValidator,
 } from '../../types/messages/change-role.js';
 import type { RawUnsupportedMessageInfo } from '../../types/messages/unsupported';
 import type { NotifTexts } from '../../types/notif-types.js';
 import type { ThreadInfo } from '../../types/thread-types.js';
 import type { RelativeUserInfo } from '../../types/user-types.js';
 import {
   ET,
   type EntityText,
   pluralizeEntityText,
 } from '../../utils/entity-text.js';
 import { entityTextToRawString } from '../../utils/entity-text.js';
 import { values } from '../../utils/objects.js';
 import { constructChangeRoleEntityText } from '../message-utils.js';
 import { notifRobotextForMessageInfo } from '../notif-utils.js';
-import { NEXT_CODE_VERSION, hasMinCodeVersion } from '../version-utils.js';
+import { hasMinCodeVersion } from '../version-utils.js';
 
 export const changeRoleMessageSpec: MessageSpec<
   ChangeRoleMessageData,
   RawChangeRoleMessageInfo,
   ChangeRoleMessageInfo,
 > = Object.freeze({
   messageContentForServerDB(
     data: ChangeRoleMessageData | RawChangeRoleMessageInfo,
   ): string {
     return JSON.stringify({
       userIDs: data.userIDs,
       newRole: data.newRole,
       roleName: data.roleName,
     });
   },
 
   messageContentForClientDB(data: RawChangeRoleMessageInfo): string {
     return this.messageContentForServerDB(data);
   },
 
   rawMessageInfoFromServerDBRow(row: Object): RawChangeRoleMessageInfo {
     const content = JSON.parse(row.content);
     return {
       type: messageTypes.CHANGE_ROLE,
       id: row.id.toString(),
       threadID: row.threadID.toString(),
       time: row.time,
       creatorID: row.creatorID.toString(),
       userIDs: content.userIDs,
       newRole: content.newRole,
       roleName: content.roleName,
     };
   },
 
   rawMessageInfoFromClientDB(
     clientDBMessageInfo: ClientDBMessageInfo,
   ): RawChangeRoleMessageInfo {
     invariant(
       clientDBMessageInfo.content !== undefined &&
         clientDBMessageInfo.content !== null,
       'content must be defined for ChangeRole',
     );
     const content = JSON.parse(clientDBMessageInfo.content);
     const rawChangeRoleMessageInfo: RawChangeRoleMessageInfo = {
       type: messageTypes.CHANGE_ROLE,
       id: clientDBMessageInfo.id,
       threadID: clientDBMessageInfo.thread,
       time: parseInt(clientDBMessageInfo.time),
       creatorID: clientDBMessageInfo.user,
       userIDs: content.userIDs,
       newRole: content.newRole,
       roleName: content.roleName,
     };
     return rawChangeRoleMessageInfo;
   },
 
   createMessageInfo(
     rawMessageInfo: RawChangeRoleMessageInfo,
     creator: RelativeUserInfo,
     params: CreateMessageInfoParams,
   ): ChangeRoleMessageInfo {
     const members = params.createRelativeUserInfos(rawMessageInfo.userIDs);
     return {
       type: messageTypes.CHANGE_ROLE,
       id: rawMessageInfo.id,
       threadID: rawMessageInfo.threadID,
       creator,
       time: rawMessageInfo.time,
       members,
       newRole: rawMessageInfo.newRole,
       roleName: rawMessageInfo.roleName,
     };
   },
 
   rawMessageInfoFromMessageData(
     messageData: ChangeRoleMessageData,
     id: ?string,
   ): RawChangeRoleMessageInfo {
     invariant(id, 'RawChangeRoleMessageInfo needs id');
     return { ...messageData, id };
   },
 
   robotext(
     messageInfo: ChangeRoleMessageInfo,
     params: RobotextParams,
   ): EntityText {
     const users = messageInfo.members;
     invariant(users.length !== 0, 'changed whose role??');
 
     const creator = ET.user({ userInfo: messageInfo.creator });
     const affectedUsers = pluralizeEntityText(
       users.map(user => ET`${ET.user({ userInfo: user })}`),
     );
 
     const { threadInfo } = params;
     invariant(threadInfo, 'ThreadInfo should be set for CHANGE_ROLE message');
 
     const threadRoleName = threadInfo.roles[messageInfo.newRole]?.name;
     const messageInfoRoleName = messageInfo.roleName;
 
     const roleName = threadRoleName ?? messageInfoRoleName;
 
     const constructedEntityText = constructChangeRoleEntityText(
       affectedUsers,
       roleName,
     );
 
     return ET`${creator} ${constructedEntityText}`;
   },
 
   async notificationTexts(
     messageInfos: $ReadOnlyArray<MessageInfo>,
     threadInfo: ThreadInfo,
   ): Promise<NotifTexts> {
     const membersObject = {};
     for (const messageInfo of messageInfos) {
       invariant(
         messageInfo.type === messageTypes.CHANGE_ROLE,
         'messageInfo should be messageTypes.CHANGE_ROLE!',
       );
       for (const member of messageInfo.members) {
         membersObject[member.id] = member;
       }
     }
     const members = values(membersObject);
 
     const mostRecentMessageInfo = messageInfos[0];
     invariant(
       mostRecentMessageInfo.type === messageTypes.CHANGE_ROLE,
       'messageInfo should be messageTypes.CHANGE_ROLE!',
     );
     const mergedMessageInfo = { ...mostRecentMessageInfo, members };
 
     const robotext = notifRobotextForMessageInfo(mergedMessageInfo, threadInfo);
     const merged = ET`${robotext} of ${ET.thread({
       display: 'shortName',
       threadInfo,
     })}`;
     return {
       merged,
       title: threadInfo.uiName,
       body: robotext,
     };
   },
 
   shimUnsupportedMessageInfo(
     rawMessageInfo: RawChangeRoleMessageInfo,
     platformDetails: ?PlatformDetails,
   ): RawChangeRoleMessageInfo | RawUnsupportedMessageInfo {
-    if (hasMinCodeVersion(platformDetails, { native: NEXT_CODE_VERSION })) {
+    if (hasMinCodeVersion(platformDetails, { native: 251 })) {
       return rawMessageInfo;
     }
 
     const { id, userIDs } = rawMessageInfo;
     invariant(id !== null && id !== undefined, 'id should be set on server');
 
     const affectedUsers = userIDs.length === 1 ? 'a member' : 'some members';
     const roleName = rawMessageInfo.roleName;
 
     const constructedEntityText = constructChangeRoleEntityText(
       affectedUsers,
       roleName,
     );
     const stringifiedEntityText = entityTextToRawString(constructedEntityText);
 
     return {
       type: messageTypes.UNSUPPORTED,
       id,
       threadID: rawMessageInfo.threadID,
       creatorID: rawMessageInfo.creatorID,
       time: rawMessageInfo.time,
       robotext: stringifiedEntityText,
       unsupportedMessageInfo: rawMessageInfo,
     };
   },
 
   unshimMessageInfo(
     unwrapped: RawChangeRoleMessageInfo,
   ): RawChangeRoleMessageInfo {
     return unwrapped;
   },
 
   notificationCollapseKey(rawMessageInfo: RawChangeRoleMessageInfo): string {
     return joinResult(
       rawMessageInfo.type,
       rawMessageInfo.threadID,
       rawMessageInfo.creatorID,
       rawMessageInfo.newRole,
     );
   },
 
   generatesNotifs: async () => pushTypes.NOTIF,
 
   validator: rawChangeRoleMessageInfoValidator,
 });