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+ you can check the usage of the query on the 18 months ago to be sure that the queries are not used anymore by someone.
How to check the query deleted by RSZDELETE
Tcode SLG1 and enter object RSZ*
Note: Basically the RSZDELETE generates logs under object ID = 'RSZ'. Function module 'RSDG_WRITE_PROTOCOL' is used for that.
Result

