and the solution was
"Update 3: Problem solved! The "AlertVariableChangeTargetService" in SQL Service Broker wasn't running. It probably happened during the SCCM upgrade we did recently or the SQL server upgrade we did before the SCCM Upgrade. You can check these Services in SQL Server Management Studio, then: Databases > CM_XY1 (SCCM Database) > Service Broker > Services"
but how to do that? If i check this service on our database it says "closed"
