Hello Hari & Jain,
This error may also have been caused because you may not have supplied the Risk Commitment Period is the definition of the Default Risk Rule.
Go to the transaction SPRO -> SAP Reference IMG -> Financial Supply Chain Management -> Treasury and Risk Management -> Credit Risk Analyzer -> Basic Settings -> Definitions -> Define Default Risk Rule.
Here you check the definition of your default risk rule. There will be a field for RCP in months. If this is lesser (or blank) then the RCP of the deal you are trying to create then this warning will be thrown.
Hope this helps.
Best Regards,
Nishikanta