This was for a voucher with a Long Invoice Number. It is not in the lookup, and if you type in the number it just just says that the number has already been used and to use a different one.
 

This "invoice" was entered (it was a fake that I entered so I could modify my check print RTM and make sure it was working right) last week. I printed it several times while I was working on the RTM and forgot to delete it when I was done. The check was printed and marked as printed this morning, and I voided it as soon as I saw it in the pile. For some reason I didn't take a close look at the list of Printed checks today...
 
I have never archived anything in DBA.