&1&2 messages will be omitted in the next formatting

What causes this issue?

A completion message, not a problem.

System Response

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

How to fix this error?

The effect of omitting messages only becomes apparent if the system log
analysis is <ZH>re-formatted</>.
How can this action be reversed?
<NP>Back</> to the selectin screen. Select the menu <LS>Settings ->
Further restrictions</> or press <LS>F11=Further restrictions</>. Under
<LS>Excepted system log messages</>, overwrite the incorrect entry with
blanks.

Error message extract from SAP system. Copyright SAP SE.