Cannot activated community, because user key by mistake;trail not allowed after code activation

Installer(.exe or .msi):exe

License type(Free, Trial/License code): Free, Trial

Studio/Robot version:studio

Current behavior:

Screenshot:

Firstly when I want to learni uipath, I mistakenly apply a free trail and activate it on my practice PC (As I didn’t understand the community and free trail); while developing I realized the mistake and want to change to community, it gives me the error: trail not allowed after code activation. what can I do?