If you can't change anything related to timecodes, it means the "Lock timecodes" is turned on in your project settings.
Open your project's settings:
Go to the "Cues" tab, uncheck "Lock timecodes" and click "APPLY":
Why do I get "timecodes are locked" message or just can't edit timecodes?
When are timing changes prevented
Written by Adam Tal
Updated over a week ago
Updated over a week ago