BOM deletion - ECN

Hi Gurus

In our scenario we are creating BOM with Change number. Change also with Change number .

While I try to do delete the BOM , used the change number which is different from the one used for Creation but valid from date is same for both Change number. BOM deletion is done. After that Checked it , BOM not valid from the effective date.

But the Problem is still it exists in MAST . When i try to create BOM with same alternative number system is not allowing to create since the entry exists already in the Table. It means Deletion not happened completely from the system.

How to delete the BOM permanently from the system which was created & changed with Change number before. Is it possible to do ?

Note : Change number was created with CC01.

Regards

Sachin