When a user attempts to edit an existing User event that they created and change it to a Course event, in the context of a course where they have permission to change events, they receive the nopermissiontoupdatecalendar exception.

Steps to reproduce:

• Create a user event on the calendar
• Edit the event and set it to type: course, and select a course from the dropdown list where the user is a teacher

Expected: The event should be updated to be a course event, given that the user has manageentries capability in the user context and the course context.

Actually happens: nopermissiontoupdatecalendar exception

Stack trace: 

Error code: nopermissiontoupdatecalendar

• line 482 of /lib/setuplib.php: moodle_exception thrown
• line 564 of /calendar/lib.php: call to print_error()
• line 893 of /calendar/externallib.php: call to calendar_event->update()
• line 228 of /lib/externallib.php: call to core_calendar_external::submit_create_update_form()
• line 59 of /lib/ajax/service.php: call to external_api::call_external_function()