diff --git a/lib/OnyxKeys.ts b/lib/OnyxKeys.ts
index 748b717d9..7fa7cf4aa 100644
--- a/lib/OnyxKeys.ts
+++ b/lib/OnyxKeys.ts
@@ -173,10 +173,11 @@ function getMembersOfCollection(collectionKey: OnyxKey): Set<OnyxKey> | undefine
  * @returns A tuple of [collectionKey, memberId]
  * @throws If the key is not a valid collection member key
  */
-function splitCollectionMemberKey<TKey extends CollectionKey, CollectionKeyType = TKey extends `${infer Prefix}_${string}` ? `${Prefix}_` : never>(
+function splitCollectionMemberKey<TKey extends CollectionKey>(
     key: TKey,
     collectionKey?: string,
-): [CollectionKeyType, string] {
+): [TKey extends `${infer Prefix}_${string}` ? `${Prefix}_` : never, string];
+function splitCollectionMemberKey(key: string, collectionKey?: string): [string, string] {
     if (collectionKey && !isCollectionMemberKey(collectionKey, key)) {
         throw new Error(`Invalid '${collectionKey}' collection key provided, it isn't compatible with '${key}' key.`);
     }
@@ -190,7 +191,7 @@ function splitCollectionMemberKey<TKey extends CollectionKey, CollectionKeyType
         collectionKey = resolvedKey;
     }
 
-    return [collectionKey as CollectionKeyType, key.slice(collectionKey.length)];
+    return [collectionKey, key.slice(collectionKey.length)];
 }
 
 /**