reason for regular errors in reservation list

Hello,

We regulary experience difficulties/errors with bad entries in the reservation list. It is always a wrong warehouse reservation, there aren't any problems with receipt reservations. It seems as if the warehouse reservation is not always deleted with deilvery of the assembly.

Most of the times the warehouse reservation is deleted. I tried to find the reason for this behaviour but I can't find it.

Any ideas?

Regards,

Patrick