⚠️ You cannot modify the periodicity if there is a completion history. You will need to recreate or empty the recurring task.
If you do not wish to keep your history
You can delete the history: Click on the recurring task > History > Click on the "Done" and "Delete" recurring tasks.
🔎 If you have several recurring tasks to empty, you can also go through an import: Export the entire registry, empty the data into Excel and reimport into Tenacy.
If you want to keep your history
You must close the recurring task with an end date and create a new one.