Dear Alex,
I am forced to use GDv1 as long there is no voucher issue addon existing on GDv2 as this is one of the main objectives in our approach.
Since we use invoicing I was informed to depreciate the geodir_invoice with corresponding geodir_payment_manager and the corresponding “affiliatewp-geodirectory” addon. Instructions > https://wpgeodirectory.com/payments-manager-v2-setup/
Therefore we had to use invoicing with corresponding wpinv-affiliatewp which has worked so far. As I can remember after the latest update from main affiliate wp they have changed some database structure to be updated on their latest upgrade.
So I guess this message has to do with those changes, but I am not 100% sure and therefore need your help to find out and solve this problem.
Best regards, Alex