& & & for background conversion already entered

What causes this issue?

A database operation is to be marked for execution in the background.
However, this operation is already entered in the table which collects
these database operations until they can be executed in the background.

System Response

The system continues.

How to fix this error?

No action necessary. This message is only for information. You might
possibly want to find out why this request was marked repeatedly.
Perhaps the program (conversion program) which executes the database
operations has not been executing for awhile.

Error message extract from SAP system. Copyright SAP SE.