Version & of process code & not allowed for ALE

What causes this issue?

Process code &v2& has version &v1&, which is not allowed for
ALE input.

How to fix this error?

Check the partner profiles for input to make sure that the process
code is correct. If the partner definitions are correct. the version
of process code &v2& must be changed.

Error message extract from SAP system. Copyright SAP SE.