I have a small problem that I would like to help me solve.

I have 2 different modules:

Module 1 called invoices, here I have all the invoices I receive.

Module 2 called checks, here I have all my checks in my wallet.

What I need to do is:

When I pay an invoice or several with a check, I need the check to change state to "used check" (I have a field for this purpose)

I've tried a thousand ways but I do not really need to give me a hand.