What does "Result Column? 'In Sector' Cannot be checked with participant" mean?
There are two fields Searchable? and Results Column? that make sense only for Public Pages and contact profile.

The field Searchable ? should be automatically unchecked when setting the visibility to "User and User Admin Only". When testing in http://dmaster.demo.civicrm.org in doesn't seems to be possible to even check them in a participant profile context.

Anyway, you might be able to submit the form by doing :


change visibility to Public Pages
uncheck Searchable? and Results Column?
change visibility back to User and User Admin Only


If that doesn't work, i suggest you udpate your CiviCRM to latest version.