Fail to add new user role

Hi I do have a great problem. The IT at a customer of mine created a Dynamics AX2012R2 test (AXTest) System and copied the database from another System (AXDev). Now when I would like to add new user roles I get an error from the SQL Server which Shows me that AX tries to contact the old db (AXDev_Model.dbo.SECURITYROLETASKGRANT) Error Shows s.th. like "invalid objectname 'AXDev_Model.dbo.SECURITYROLETASKGRANT'" What happend and how can this be resolved?