Error on voucher?

[Trustmybet]

I was selling a 2.69 voucher for somebody to buy booch's plank script. Ive sold many vouchers before and this never happened.

 

Gave him the code, got the paypal confirmation and everything. He says theres an error and shows this: 

 

 

 

 

 

 

[RoomScape]

Did he check his credit to see if it's already been applied? Someone told me that happened to them and I asked them to check if it's already been applied and it was. I guess os lagged for them or they pressed enter twice.

[Trustmybet]

FIXED. Close plz