Role master with customer account of partner is only valid in period from

Hi,

When I create a lease out contract in RE-FX and assign a business partner, I am getting a warning message " Role Master with customer account of partner is only valid in period from 09.11.2009. Message no. REBPBP2035."

Business partner was created on 9-11-09. The contract is for period 01.06.2009 to 31.12.2015.

How can I get this solved with no warning message ?

Regards,

T Saravanan