'Assignment' can't be changed after saving

Hi All,

The fileld 'Assignment' can't be changed after saving.

The field Assignment (BSEG-ZUONR) can't be changed even though the field is marked as 'Field can be changed' in 'Rules for changing dokuments' in the SPRO. The correction was tried via FBL1N and FB02.

There had been a Speciel Purpuse Ledger which included the field. The ledger is however deleted on the client

Let me know your views if anyone come acrossed the same secnario.

Regards

Madhavi