django-celery not flushing interval_id on periodictask when changing schedule of task from timedelta to crontab

[luislizarraga]

Hi, I'm using Django 1.9.2 with Celery 3.1.20 and django-celery 3.1.17. When I had to change the schedule of a task from timedelta(seconds=5) to crontab(), the interval_id from the entry of the task on the table djcelery_periodictask wasn't set to NULL, so it was running every 5 seconds, as well as every minute.

The workaround was to stop Celery, clear all entries on djcelery_periodictask table and start Celery, so that it would populate all tasks with their respective interval and contrab ids.

[luislizarraga]

Issue #351 solves it, but hasn't been merged

I just experienced a similar issue

[luislizarraga]

Thanks @auvipy for merging pull request #351 to master. We just have to wait for the next release :D.
@ionatower, you can use the workaround I mentioned in the OP, at least until there's a new release of django-celery.

[auvipy]

you can also install the master using pip