Modify Job Requisition after Advert at Career Site

Summary:

Any way to Modify Job Requistion after Posting at career site

Content (please ensure you mask any confidential information):

We have create Requisition and then posting on Careear site, After some managment instruction we need to change some change in that requisition but system doens't allow, is there any way to do so.

Thanks.

Version (include the version you are using, if applicable):

23.c

Code Snippet (add any code snippets that support your topic, if applicable):