Foreman Maintain

Description of problem:

The following traceback is observed during upgrade from 6.9 to 6.10:
~_{~
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: Traceback (most recent call last):
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/bin/rq", line 11, in <module>
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: load_entry_point('rq==1.8.1', 'console_scripts', 'rq')()
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/click/core.py", line 829, in call
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: return self.main(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/click/core.py", line 782, in main
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: rv = self.invoke(ctx)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: return _process_result(sub_ctx.command.invoke(sub_ctx))
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: return ctx.invoke(self.callback, **ctx.params)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/click/core.py", line 610, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: return callback(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/rq/cli/cli.py", line 83, in wrapper
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: return ctx.invoke(func, cli_config, *args[1:], **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/click/core.py", line 610, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: return callback(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/rq/cli/cli.py", line 256, in worker
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: serializer=serializer
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: File "/usr/lib/python3.6/site-packages/pulpcore/tasking/worker.py", line 67, in init
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: raise NotImplementedError("This worker is not supposed to run with new style tasks.")
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: NotImplementedError: This worker is not supposed to run with new style tasks.
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: Traceback (most recent call last):
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/bin/rq", line 11, in <module>
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: load_entry_point('rq==1.8.1', 'console_scripts', 'rq')()
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 829, in call
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return self.main(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 782, in main
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: rv = self.invoke(ctx)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return _process_result(sub_ctx.command.invoke(sub_ctx))
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return ctx.invoke(self.callback, **ctx.params)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 610, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return callback(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/rq/cli/cli.py", line 83, in wrapper
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return ctx.invoke(func, cli_config, *args[1:], **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 610, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return callback(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/rq/cli/cli.py", line 256, in worker
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: serializer=serializer
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/pulpcore/tasking/worker.py", line 67, in init
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: raise NotImplementedError("This worker is not supposed to run with new style tasks.")
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: NotImplementedError: This worker is not supposed to run with new style tasks.}
~~

Version-Release number of selected component (if applicable):
6.9.4 > 6.10

How reproducible:
100%

Steps to Reproduce:
1. satellite-maintain upgrade run --target-version 6.10
2. observe /var/log/messages
3.

Actual results:
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: raise NotImplementedError("This worker is not supposed to run with new style tasks.")
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-2: NotImplementedError: This worker is not supposed to run with new style tasks.
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: Traceback (most recent call last):
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/bin/rq", line 11, in <module>
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: load_entry_point('rq==1.8.1', 'console_scripts', 'rq')()
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 829, in call
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return self.main(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 782, in main
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: rv = self.invoke(ctx)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return _process_result(sub_ctx.command.invoke(sub_ctx))
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return ctx.invoke(self.callback, **ctx.params)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 610, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return callback(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/rq/cli/cli.py", line 83, in wrapper
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return ctx.invoke(func, cli_config, *args[1:], **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/click/core.py", line 610, in invoke
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: return callback(*args, **kwargs)
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/rq/cli/cli.py", line 256, in worker
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: serializer=serializer
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: File "/usr/lib/python3.6/site-packages/pulpcore/tasking/worker.py", line 67, in init
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: raise NotImplementedError("This worker is not supposed to run with new style tasks.")
Aug 16 13:07:16 ktordeur-testathon pulpcore-worker-3: NotImplementedError: This worker is not supposed to run with new style tasks.

Expected results:
No such tracebacks

Additional info: