This is a huge Planner limitation. We created a number of flows to create daily tasks for one of our clients retail operation. They loved the routine daily reminders until they stopped working when the number of tasks assigned to a user was exceeded. With no easy mass delete option, we had to blow away the plan buckets and reinitialize all the flows with the new bucket id to get things working again. We'll have to do this once every month. Microsoft needs to provide a flow, powershell or some mechanism to delete or purge old tasks.
This is a huge Planner limitation. We created a number of flows to create daily tasks for one of our clients retail operation. They loved the routine daily reminders until they stopped working when the number of tasks assigned to a user was exceeded. With no easy mass delete option, we had to blow away the plan buckets and reinitialize all the flows with the new bucket id to get things working again. We'll have to do this once every month. Microsoft needs to provide a flow, powershell or some mechanism to delete or purge old tasks.