How to enforce autocreate of a requisition into RFQ only once ?

Hello,

Our buyer has a big autocreate queue to handle.

The buyer needs to autocreate  requisition say 10001 into a RFQ.

Now on a day to day basis he autocreates many requisitions into RFQ.

Once the requisition is autocreated into RFQ, it still shows in the autocreate queue.

What is the best way to remove the requisitions which are autocreated into RFQ from the autocreate queue ?

Please feel free to advice on best practices around management of autocreate queue.

thanks in advance,

Stefanie