users: in case of multiple personal groups, return the first instead of an error.

- backward compat fix from previous error we had

rhodecode/model/db.py

@@ -2498,7 +2498,9 b' class RepoGroup(Base, BaseModel):'
 
         return cls.query()\
             .filter(cls.personal == true()) \
-            .filter(cls.user == user).scalar()
+            .filter(cls.user == user) \
+            .order_by(cls.group_id.asc()) \
+            .first()
 
     @classmethod
     def get_all_repo_groups(cls, user_id=Optional(None), group_id=Optional(None),