Question: Can the Job code be changed after approved?

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Hello All, 

Our leadership team is inquiring about TTF.  This stems from our current the process flow. 

Here in our organization, we have the managers create their requisitions.  Then it goes through an approval process, then Recruiter is assigned the requisition, meet with manager, post job, etc.  However, there are times when the positions is cancelled by either an upgrade /downgrade OR the manager used the wrong job code.

This results in having the original requisition cancelled with a replacement requisitions put in its place.  Hence TTF is skewed. 

Recruiters are asking if the job code can be replaced in the requisition.  Can this be done after the req approval or cancelled?