Cannot do posting for a particular profit center

Hi SAP Experts,

There is one strange issue that i am facing. I have one company code and when i try to do FB50 with a 520000 profit center then the system throws errors msg.

Profit center 520000 not valid, Message no. ZFI000.

If i use other profit cneter they system allows to do the posting, even if a create a new profit center still i can use that profit center for the company code

I have check that this profit center is active and co codes is assinged.

I am not able to understand why system is behaving in such a manner ??

Regards.