Default interest key determined in payment against security deposit
I am creating a request for security deposit by transaction FPSEC1. In that I have maintianed interest key as "03-Exemption of Interest on Security deposit"
A statistical entry is getting posted in business partners account.
After that I am creating a check lot and posting payment against the above security depost request.
In the payment document generated by check lot the interest key is getting changed to "04-Interest on Security Deposit".
Please help me why the interest key entered in security deposit is not transferred to payment document. Any how this interest key is automatically determined in payment document.