Warning: Check whether a duplicate payment medium has been created

What causes this issue?

The system has determined that the attributes of the payment medium
file with reference number &V1& are the same as the attributes of the
file that has just been created (reference number &V2&). The attributes
that were compared include:
Paying company code
Bank country
Payment run (date and ID)
Data medium format
Total amount and currency
It is highly likely that the data medium that has just been created is
a duplicate.

System Response

Warning

How to fix this error?

Check the data medium before sending it to the bank to avoid paying
twice.

Error message extract from SAP system. Copyright SAP SE.