Company code 9000 is not assigned to an FM area

Dear Experts,

I am receiving this error "Company code 9000 is not assigned to an FM area" when i assign the company code(9000) to a controlling area([T-code OX19] IMG u2192 Enterprise Structure u2192 Assignment u2192 Controlling u2192 Assign Company Code to Controlling Area).

I do not want to activate the FM area for my implementation. Please guide me on, how to deactivate the FM function.

Many thanks.