SAP Message WL817 - Work item &: Deadline data cannot be deleted (table &)

Diagnosis
The deadline monitoring data for the work item cannot be deleted. Itwas not possible to update either the relevent work item data (tableSWWWIDEADL) or the control table of all deadlines for monitoringthe background job SWWDHEX (table SWWWIDH).

System Response
The action was terminated, the work item was not changed.
INCLUDE NA_WF-ADMINISTRATOR OBJECT DOKU ID TX

Procedure for System Administration
Check the scheduling of the background job SWWDHEX.