Compare the event behind each invitation
Two messages may use different titles for one concert. Check the school group, date, start time, entrance and person who sent the information. If they match, keep the organizer’s version as the source people will follow. Ask before deleting entries that differ in a meaningful way. “Choir rehearsal” and “Spring concert” might be linked but genuinely separate appointments even if they are at the same school on the same day.
Keep an independent job separate from the event
A separate transport task can still be useful. Label it “Drive to school for spring concert” and link it to the event in plain words. When the school changes the concert time, update the transport plan too. It covers a different responsibility.
Work through a corrected example
The school moves the concert from six to six thirty. The shared calendar now needs one concert at six thirty, plus a separate transport entry if the organizer confirms the instrument is still due at five forty-five. Check that the old six o’clock reminder has disappeared. If a second adult still sees six on their phone, identify the duplicate on that calendar instead of changing the organizer’s correct invitation back to the wrong time.