In use templates
Templates considered in use are identified by a lock icon to the right of their title. A template in use means that the template is used in a current or past review cycle.
Edit a template in use
To avoid compromising your review cycle, questions that are in an in-use template cannot be edited. However, the title, tags, and instructions remain editable. As a rule of thumb, templates can only be edited until they're associated with a review cycle.
If you would like to make adjustments to an in-use template, you can duplicate the template and make your changes in the new, duplicate template. Learn the complete process in How to Edit a Question in an In Use Template.
If the template you want to delete or edit is only being used in a test review cycle, deleting the test review cycle will free up the ability to edit the template.