PayPal "This invoice has already been paid"

[ken0412]

Hi I'm a new member and just getting s2member setup. I've created my membership options page including all of my paypal button setups. I then made a test purchase and it seemed to work fine but when I tried to make another test purchase under a different username I keep getting the following error from paypal. "This invoice has already been paid. For more information, please contact the merchant" Does anyone know why this is occurring and how to fix it? Thanks!

[Cristián Lávaque]

Hi Ken.

When you pay it again, how do you go about it? Do you just refresh the page, do you log out of your previous account before or stay logged in? Could you explain the sequence you follow, please? Thanks!