SAP Message /MAP/AD01027 - Assignment &1, &2 is already released and cannot be deleted

Diagnosis
You have tried to delete a previously released assignment. However, thisis not possible.

System Response
The action is not performed.

Procedure
As soon as assignments are released from BW to the operational systems,they can only be changed in these systems.
However, it is possible to exit previously released assignments inassortment definition. You can use the relevant pushbutton to exitassignments.