Hello
From my reading it appears that there was an issue posting system checks in AP service pack 20200716. That appears to have been fixed in SP 200811.
However we appear to have had 2 batches create the errors well we had the older pack and well that does not happen anymore under the new one I can't find instructions to repair the errors that are appearing in 6 of our vendors.
I've tried to use data integrity check and it finds the errors and says it has fixed the errors but I go look at the vendor and the error is now different.
Before the repair it showed the invoices as outstanding and the payment as zero. After it shows both the payment and invoices outstanding but I can't find a way to apply them to each other and clear them.