Diagnosis
A report is generated from the specifications you make when definingthe layout of your query list. The name of this report always beginswith AQ, while the subsequent characters provide information about theuser group, the client and the query itself. These report names areprotected, i.e. they are reserved for ABAP/4 Query and cannot be usedfor other purposes.
You attempted to create a query that would generate a report whichalready exists. For this reason, you cannot create a query with thisname, since it would overwrite an existing report.

Procedure
First, check which user owns the report specified in the message andwhy this name was chosen. Then, try to get the report deleted orrenamed, so that you are not restricted in your choice of query names.If this is not possible, you cannot create a query with this name.