3811960 - Error in the logs "NUMBER OF NAMES NOT EQUAL TO RESERVATIONS"

I am getting an error message saying when trying to confirm a flight reservation "We were unable to finalize your reservation. This can happen for a variety of reasons beyond our control, most often due to the airline updating your reservation at the same time we were trying to do the same. If you continue to receive this error, please contact your agency to complete your booking. We apologize for any inconvenience"

User receives error "We're Sorry… We encountered an issue that prevented us from completing your request". The error message "NUMBER OF NAMES NOT EQUAL TO RESERVATIONS" is returned in the logs , KBA , CON-SRV-TRV-ADM-LAN , View Airlines , Problem