Repair SourceOne - Failed to query Systemconfig table to get the ExDpKey

While repairing the SourceOne environment the following error pops up during the Worker Services repairing process:

Failed to query the SystemConfig table to get the ExDpKey. This value must exist in the database and is created by the Master installer.

Note: the master installer has succeeded succesfuly

This error is showing after the Database system information page on the EMC SourceOne Worker Services Installation is filled in.

Any solutions?