After creating a new task, all previous tasks are not running

[lionjiadong]

Summary:

Include a brief descrioption of the problem here, and fill out the version info below.

• Celery Version: 5.05
• Celery-Beat Version: 2.2

Exact steps to reproduce the issue:

1. in django admin add three task
   
   interval_test, interval_test2, interval_test3
2. Every time you create one, you will find that the previously created task will no longer run
   
   interval测试 : Normal operation after creation,
   interval测试2 : interval测试 does not run after creation
   interval测试3 : interval测试 and interval测试2 does not run after creation

[auvipy]

I am not sure its a celery issue or not

[lionjiadong]

I am not sure its a celery issue or not

There will be problems with the database management plan

[yashikakhurana]

I faced the same issue when I was trying to inherit the PeriodicTask. Can you provide more insights, may be I could help then.

[lionjiadong]

当我尝试继承PeriodicTask时，我遇到了同样的问题。您能否提供更多见解，也许可以帮助您。

I reset the last_run_at of all tasks every time I create or modify a task to ensure that each task will be executed as scheduled

[yashikakhurana]

have you tried restarting celery whenever you modify or create something?

[yashikakhurana]

FYI my issue was resolved using signals.pre_delete() and signals.pre_save().