Change before earliest retro. date

Hi

I'm getting the following error when trying to put a to-date(31.08.2007) to the banking details(infotype 09) type 1(other). Current date = 01.05.2006 To-date = 31.12.9999.

<b>"Change before earliest retro. date 01.03.2007 acc. to control rec. to py area ZN"</b>

What could be the problem?