diff --git a/native/roles/create-roles-header-right-button.react.js b/native/roles/create-roles-header-right-button.react.js
--- a/native/roles/create-roles-header-right-button.react.js
+++ b/native/roles/create-roles-header-right-button.react.js
@@ -12,23 +12,36 @@
   useServerCall,
   useDispatchActionPromise,
 } from 'lib/utils/action-utils.js';
+import { values } from 'lib/utils/objects.js';
 
 import type { NavigationRoute } from '../navigation/route-names';
 import { useStyles } from '../themes/colors.js';
 
 type Props = {
   +route: NavigationRoute<'CreateRolesScreen'>,
+  +setRoleCreationFailed: boolean => mixed,
 };
 
 function CreateRolesHeaderRightButton(props: Props): React.Node {
   const { threadInfo, action, roleName, rolePermissions } = props.route.params;
+  const { setRoleCreationFailed } = props;
   const navigation = useNavigation();
   const styles = useStyles(unboundStyles);
 
   const callModifyCommunityRole = useServerCall(modifyCommunityRole);
   const dispatchActionPromise = useDispatchActionPromise();
 
+  const threadRoleNames = React.useMemo(
+    () => values(threadInfo.roles).map(role => role.name),
+    [threadInfo.roles],
+  );
+
   const onPressCreate = React.useCallback(() => {
+    if (threadRoleNames.includes(roleName)) {
+      setRoleCreationFailed(true);
+      return;
+    }
+
     dispatchActionPromise(
       modifyCommunityRoleActionTypes,
       callModifyCommunityRole({
@@ -48,6 +61,8 @@
     roleName,
     rolePermissions,
     navigation,
+    setRoleCreationFailed,
+    threadRoleNames,
   ]);
 
   const shouldHeaderRightBeDisabled = roleName.length === 0;
diff --git a/native/roles/create-roles-screen.react.js b/native/roles/create-roles-screen.react.js
--- a/native/roles/create-roles-screen.react.js
+++ b/native/roles/create-roles-screen.react.js
@@ -57,8 +57,19 @@
     $ReadOnlySet<UserSurfacedPermission>,
   >(defaultRolePermissions);
 
+  const [roleCreationFailed, setRoleCreationFailed] =
+    React.useState<boolean>(false);
+
   const styles = useStyles(unboundStyles);
 
+  const errorStyles = React.useMemo(
+    () =>
+      roleCreationFailed
+        ? [styles.errorContainer, styles.errorContainerVisible]
+        : styles.errorContainer,
+    [roleCreationFailed, styles.errorContainer, styles.errorContainerVisible],
+  );
+
   const onClearPermissions = React.useCallback(() => {
     setSelectedPermissions(new Set());
   }, []);
@@ -140,6 +151,7 @@
   );
 
   const onChangeRoleNameInput = React.useCallback((roleName: string) => {
+    setRoleCreationFailed(false);
     setCustomRoleName(roleName);
   }, []);
 
@@ -158,7 +170,12 @@
             );
           }
 
-          return <CreateRolesHeaderRightButton route={props.route} />;
+          return (
+            <CreateRolesHeaderRightButton
+              route={props.route}
+              setRoleCreationFailed={setRoleCreationFailed}
+            />
+          );
         },
       }),
     [
@@ -182,6 +199,11 @@
           />
           <SWMansionIcon name="edit-1" size={20} style={styles.pencilIcon} />
         </View>
+        <View style={errorStyles}>
+          <Text style={styles.errorText}>
+            There is already a role with this name in the community
+          </Text>
+        </View>
       </View>
       <View style={styles.permissionsContainer}>
         <View style={styles.permissionsHeader}>
@@ -219,6 +241,18 @@
   pencilIcon: {
     color: 'panelInputSecondaryForeground',
   },
+  errorContainer: {
+    marginTop: 10,
+    alignItems: 'center',
+    opacity: 0,
+  },
+  errorContainerVisible: {
+    opacity: 1,
+  },
+  errorText: {
+    color: 'redText',
+    fontSize: 14,
+  },
   permissionsContainer: {
     marginTop: 20,
     paddingBottom: 220,