When trying to change the works category from minor to immediate urgent error message shows up: "TMA-0139 Error not found in NM_ERRORS"
Also you might see this message: The Works Category is incorrect for the current Phase Status. Please re-enter the Works Category.
This might fail is due to works being at "Planned Works About To Start" status, which is an invalid status for work category Immediate Urgent. The category can't be changed unless the status changes.
The workaround for this would be to cancel current works and create a new immediate urgent works.