Error and massive lag - PlusEMU Habboon

_{Hey guys so i'm just playing around with PlusEMU on my own pc with a few friends on it, however sometimes i'll get this error and then a massive lag will occur on my hotel, anyone know a solution for this?:}

Error in query:
REPLACE INTO `user_achievements` VALUES ('2678', @group, '5', '1050')
System.InvalidOperationException: Connection must be valid and open.
at MySql.Data.MySqlClient.ExceptionInterceptor.Throw(Exception exception)
at MySql.Data.MySqlClient.MySqlCommand.CheckState()
at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery()
at Plus.Database.Adapter.QueryAdapter.RunQuery() in C:\Users\Administrator\Desktop\PlusEMU\Database\Adapter\QueryAdapter.cs:line 177

Probally because a wrong setup. PlusEmu should work without any issues/lag but it's just the setup.

Code:

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REPLACE INTO `user_achievements` VALUES ('2678', @group, '5', '1050')

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@group hasn't been defined, it seems. Find it where it gets executed from and then define it correctly.

nevermind fixed it.