diff --git a/src/database/server/models/user.ts b/src/database/server/models/user.ts
index ef2a190c87f6..e4341d9c5a90 100644
--- a/src/database/server/models/user.ts
+++ b/src/database/server/models/user.ts
@@ -19,6 +19,12 @@ export class UserNotFoundError extends TRPCError {
 
 export class UserModel {
   static createUser = async (params: NewUser) => {
+    // if user already exists, skip creation
+    if (params.id) {
+      const user = await serverDB.query.users.findFirst({ where: eq(users.id, params.id) });
+      if (!!user) return;
+    }
+
     const [user] = await serverDB
       .insert(users)
       .values({ ...params })
diff --git a/src/libs/langchain/loaders/index.ts b/src/libs/langchain/loaders/index.ts
index df9884d2038f..205b2dfc9004 100644
--- a/src/libs/langchain/loaders/index.ts
+++ b/src/libs/langchain/loaders/index.ts
@@ -61,7 +61,7 @@ export class ChunkingLoader {
 
         default: {
           throw new Error(
-            'Unsupported file type, please check your file is a supported type, or just create an issue.',
+            `Unsupported file type [${type}], please check your file is supported, or create report issue here: https://github.com/lobehub/lobe-chat/discussions/3550`,
           );
         }
       }