.NET databound lists

Is there any way around the following?

I have a few dropdown lists bound to lookup tables in SQL Server. Some开发者_Go百科 old records imported from a previos version of the system won't open due to data in these fields not matching the current dropdown data.

Other than adding the old data to the lookup table (which I don't want to do), is there a way around this?

I got it. Clumsy but it works,

I catch the error when the page can't open due to the data not being in the dropdown any more, then:

list.Items.Insert(0, new_thing);
list.SelectedIndex = 0;