Unaccounted payments with Conversion Gain /Loss class CVR erros

2 bank accounts : ABC and DEF are mapped to centralized payment business unit A123. All US business units have a payment business unit of A123. GBP and EUR invoices on the US ledger can be coded to any company/GL string within the same ledger and processed via these accounts. However, if there is a Gain/Loss/Rounding issue, we are seeing frequent CVR errors because the configuration is trying to take the GL account from the manage common options or specify ledger configuration. We need a future state solution to post these invoices automatically without errors.