Config File Compare fails with "This action has been picked up multiple times without a successful transaction; this action is now failed for this system."

Issue

• Several registered server received the following errors:

Summary:    Show differences between profiled config files and deployed config files scheduled by system.example.com
Details:    This action will be executed after 08/ 7/12 9:45:59 AM CEST.

This action's status is: Failed.
The client picked up this action on 08/ 7/12 9:46:58 AM CEST.
The client completed this action on 08/ 7/12 9:47:13 AM CEST.
Client execution returned "This action has been picked up multiple times without a successful transaction; this action is now failed for this system." (code )