[Python] django celery: object has no attribute 'delay_on_commit'

django 4.2 with celery 5.5.1

launching a celery task from a django view sometimes causes "'generate_report' object has no attribute 'delay_on_commit'"

# tasks.py
from celery import shared_task

@shared_task
def generate_report(data):
# Code to generate report
...



# django view
def testview(request):
from tasks import generate_report

generate_report.delay_on_commit("mytestdata")

return render(request, "simple_page.html")



This happens on some deployments, but not on all. And when it happens, a server (webapp) reboot solves the issue. Moving the "generate_report" import to the top of the file also did not help.

Note: Code is deployed on pythonanywhere.com with several celery workers running in "always on" tasks.

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