why F110 payment medium still can generate, after payment documents are reversed via F.08

Dear experts,

Our steps: 1) F110 - paramters, then "proposal", then "Payment run"

2) user found cleared wrong vendor open items, then they use FBRA to reverse and reset the payment documents

3) user accidently click on <Print out>, payment medium file was generated, sent to bank.

my question is, as in step 2, we already reversed the payment documents, why payment medium file still can been generated? how can we stop payment medium file's genration if payment documents are reversed?

Thanks,

Grace