If any provision of this Deed to Secure Debt should be held unenforceable or void, then that provision shall be separated from the remaining provisions and shall not affect the validity of this Deed to Secure Debt except that if the unenforceable or void provision relates to the payment of any monetary sum, then, Grantee may, at its option, declare the Secured Indebtedness immediately due and payable but without the payment of any Prepayment Fee.