How to change requsition from auction to blanket release?

We are using EBS version 12.2.4

I have a requisition which have two lines. Both have completed the workflow approval.

We are trying to create PO from the requisition using auto create.

For the line 2, we wanted to choose blanket release and then click autocreate, but accidentally chose auction and click autocreate.

Now, I cannot find this line in the workbench anymore.

Please advise how we can change it back?

Gurus, please advise. We have never used auction before. So not sure what to do.