Acquisition value negative in area 01

Dear Gurus,

I am trying to do MIRO, where in I got the subject error. This error comes up only if I reduce the amount of MIRO than of the amount of PO. If I increase I do not get an error.

I read many documents on SDN, it said that you need to activate the -ve postings allowed for Depreciation areas.

I have a question here, I used to have -ve postings earlier also with credit memos, why this time the error got generated ?

Early help would really be appreciated.

Thanks and Regards,

Nirav Shah