Add tasks to existing calendar

Hi there, Iโ€™d like to add tasks to an existing calendar. Is that possible or do I have to create a new calendar with task functionality?

Thanks for your hints!

Any clues? I have the same problemโ€ฆ

If you have access to the database, adjust the field components in the table oc_calendars of the according calendar from VEVENT to VEVENT,VTODO