Is there a way of mass updating requisitions to change the requester?

I know the 'Mass Update of Requisitions' can be run on an individual basis but we are doing a (long overdue) housekeeping exercise and have identified circa 500 users that have left the organization and have open requisitions that need assigning to a different/active requester. We're trying to avoid having to run the request individually/500 times to update requisitions for each user concerned.

Currently on Oracle 12.1.3