One or more accounting distributions is missing a ledger account. Use the Accounting distribution form or the Posting profile to update the ledger account.

I am getting the following message when I try to submit a PO with "Total Discounts".

"One or more accounting distributions is missing a ledger account. Use the Accounting distribution form or the Posting profile to update the ledger account."

It is missing the ledger account for some reason.  I have checked the item group and the discount ledger number is setup.  All other types of Trade agreements work fine.  Any suggestions?

One or more accounting distributions is missing a ledger account. Use the Accounting distribution form or the Posting profile to update the ledger account.