Message cannot be processed at the moment: invalid version details (&)

What causes this issue?

The message could not be sent, since the log version of the external
server (&V1&) is not consistent with the log version of the SAP system.

System Response

Processing was terminated.

How to fix this error?

Attempt to resend the message at a later time.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.