Diagnosis
When you delete subgroups, it is also necessary to delete thecorresponding number range intervals. This was not fully done.

System Response
When the changes are saved, the system checks whether there areintervals of the subgroups still to be deleted. You cannot save thechanges if there are subgroups still to be deleted.

Procedure
Please check which subgroups are to be deleted. You can display theentries with delete flags and if necessary, reset these. When you thensave the data, the system will again check that all intervals concernedhave been deleted.