If there is any claim line that has been Rejected or Cancelled, but others on the same invoice have processed, the invoice will sit in the Override Claims list. We are assuming it requires intervention so we are not passing it through to the payment batch creation step automatically. This allows you to claim additional lines and make the invoice ready for payment in its entirety.
You can elect to override this and Enable Payment, Edit the claim, or Cancel the Claim.
Read about Reconciling payments here: Payment Batch amount is less than has been paid to bank account