This likely indicates that you have an integration test configured to run every 2 hours, and that test is consistently failing. Integration tests create new namespaces on the fly to run your test in isolation, and the namespace is only deleted if the test succeeds. If the test fails, it’s left behind so you can switch to that namespace and debug whatever went wrong.

I would recommend that you remove the scheduling from that test so it stops running until you have a chance to debug the test and understand why it is consistently failing. Once you figure out why your test is failing it should be safe to delete all of these generated namespaces.

Please reach out to support if you have any trouble.