You have an AEP Target connection. After attempting to delete a segment from the AEP user interface (UI) that was sent to Target, you see the destination status as Error.
Un-map the segments in AEP. The segments are then removed automatically from Target.
To un-map segments in AEP:
The DELETE destination failed because some of the mapped segments were already removed from Target, since then the destination was in a DELETE-Stuck state.