Diagnosis
A data record for the force element with the same service offer alreadyexists in an overlapping period.
It is possible that you cannot see this record in the table at themoment, perhaps because you selected another period for display, orfiltered the selection by a particular status. It is also possible thatyou are not authorized to display or process records with the status ofthe overlapping record. However, you cannot create a new record in thisperiod.

System Response
The data record you entered cannot be stored because a service from aforce element can only be offered once for a particular period. Here,the status of the old and new record is irrelevant.

Procedure
Change the period so that it does not overlap, or delimit the otherrecord accordingly.