If you've accidentally archived your requisition prior to it being approved or rejected, you can now simply unarchive your requisition instead of creating a new one.
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First, locate the requisition under the Archived section of Requisitions section
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Then, click on the ellipsis (the three dots) at the right of the requisition that you'd like to unarchive and click on 'Unarchive'.

You'll see your requisition has been restored under the Open section and you can continue working on it there.
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