Clearing - Balance Account withou Profit Center

Hi gurus,

Can someone tell me how I can perform a clearing in a balance account for an old amount without Profit Center?

I cannot do it since there is some kind of protection in the system not to allow postings in balance account without Profit Center.

In MD, Field Status Group, all of them have the Profit Center flagged as Opt. Entry, but cannot do it in the system.

Many thanks