What is the difference between the capabilities moodle/role:override and moodle/role:safeoverride?
The capability moodle/role:safeoverride was added to Moodle 1.9.3 onwards, as a way of enabling teachers to override permissions safely. The capability moodle/role:override allows a user to override all permissions, whereas moodle/role:safeoverride only allows a user to override capabilities that do not have major risks attached to them.