diff --git a/app/ui-cached-collection/client/models/CachedCollection.js b/app/ui-cached-collection/client/models/CachedCollection.js
index 59929c54ce0..8450ee6b879 100644
--- a/app/ui-cached-collection/client/models/CachedCollection.js
+++ b/app/ui-cached-collection/client/models/CachedCollection.js
@@ -129,7 +129,7 @@ export class CachedCollection extends EventEmitter {
 		userRelated = true,
 		listenChangesForLoggedUsersOnly = false,
 		useSync = true,
-		version = 9,
+		version = 10,
 		maxCacheTime = 60 * 60 * 24 * 30,
 		onSyncData = (/* action, record */) => {},
 	}) {
diff --git a/app/ui-sidenav/client/roomList.js b/app/ui-sidenav/client/roomList.js
index f6a062df8d7..ad77a565456 100644
--- a/app/ui-sidenav/client/roomList.js
+++ b/app/ui-sidenav/client/roomList.js
@@ -136,8 +136,8 @@ const getLowerCaseNames = (room, nameDefault = '', fnameDefault = '') => {
 	const name = room.name || nameDefault;
 	const fname = room.fname || fnameDefault || name;
 	return {
-		lowerCaseName: name.toLowerCase(),
-		lowerCaseFName: fname.toLowerCase(),
+		lowerCaseName: String(name).toLowerCase(),
+		lowerCaseFName: String(fname).toLowerCase(),
 	};
 };