更新

app/Models/UserVipLimit.php

@@ -8,6 +8,7 @@ class UserVipLimit extends BaseModel
 {
     protected $table = 'users_vip_limit';
     public $timestamps = false;
+    protected $primaryKey="user_id";
     protected $fillable = ['user_id', 'weixin','user','dynamic'];
 
 }