Version numbers for & & are currently being processed; please wait

What causes this issue?

The version numbers for payment proposal &V1& &V2& are presently being
updated by user &V3&.

System Response

It will not be possible to process the payment proposal for a short
while.

How to fix this error?

Try again to process the payment proposal. If, even after waiting for a
short time, you are still unable to process the proposal, inform your
system administrator. He/she will analyze the reason for the block and
possibly manually delete the block.
<DS:TRAN.SM12>Proceed</>

Error message extract from SAP system. Copyright SAP SE.