Is it possible to change creator of workitem using oslc APIs or any other way?
One answer
I have previously done this by exporting out the ID, Artifact Type and Creator attributes, then updated the created by attribute to the correct value - recommend you use the users email address versus common name - and this also have sufficient rights on the work items and that the new name is a member of your project area.
Example
ID Type Created By
123 Task joe@nowhere.com ----> update Created by to fred@nowhere.com
Import to the system to overwrite the data.