Deferred Revenue

Hi ,
can anyone help me please.Actually i doing a sales invoice with deferred revenue and then i could not submit that sales invoice.

Here are steps how i proceed:
Creating of item

then creating sales Invoice

this message is displayed when i click on submit

check the account 23041 - Deferred Revenue - SIL’s account type in chart of account, the acocunt type should not be Payable which makes supplier mandatory.