Meanwhile, the reports should change as follows:
so you have to create a Cons_Payment table where you register the delivery to which Payment must be related, as you can see below:
moreover you have made mistakes in the structure of the Cons table where for example the FK_BrandID field has the Required property set to Yes but then the data is not inserted.
So, to conclude, you need to create a mask that allows you to select the Cons paid but not yet associated with Paymentsand insert it in Cons_Payment with the relative data.