RhodeCode CE/EE

After the upgrade I get a Server Error 500 and basically identical tracebacks looking like this. I revered the container back afterwards.

Exceptions Tracker - Exception ID: 139841427643760
Exception `CommitDoesNotExistError` generated on UTC date: 2020-06-15T18:42:16.671343
Request: GET http://rhodecodekit.rise:10020/libpython/pull-request/448
10.30.11.1 Mozilla/5.0 (X11; Linux x86_64; rv:72.0) Gecko/20100101 Firefox/72.0

Traceback (most recent call last):
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/tweens.py", line 41, in excview_tween
    response = handler(request)
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/router.py", line 148, in handle_request
    registry, request, context, context_iface, view_name
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/view.py", line 667, in _call_view
    response = view_callable(context, request)
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/config/views.py", line 188, in attr_view
    return view(context, request)
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/config/views.py", line 214, in predicate_wrapper
    return view(context, request)
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/viewderivers.py", line 436, in rendered_view
    result = view(context, request)
  File "/opt/rhodecode/store/da2il1f83gci4333j0sd256nji9nlhpa-python2.7-pyramid-1.10.4/lib/python2.7/site-packages/pyramid/viewderivers.py", line 132, in _class_view
    response = getattr(inst, attr)()
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/lib/auth.py", line 2498, in local_wrapper
    return wrapper(func, *args, **kwds)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/lib/auth.py", line 1814, in __wrapper
    return func(*fargs, **fkwargs)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/lib/auth.py", line 2498, in local_wrapper
    return wrapper(func, *args, **kwds)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/lib/auth.py", line 1888, in __wrapper
    return func(*fargs, **fkwargs)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/apps/repository/views/repo_pull_requests.py", line 605, in pull_request_show
    hide_whitespace_changes, diff_context)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/apps/repository/views/repo_pull_requests.py", line 221, in _get_diffset
    hide_whitespace_changes, diff_context)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/model/pull_request.py", line 1787, in get_diff
    hide_whitespace_changes=hide_whitespace_changes, diff_context=diff_context)
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/model/pull_request.py", line 1794, in _get_diff_from_pr_or_version
    commit_id=safe_str(target_ref_id))
  File "/opt/rhodecode/store/avpzwi69pbzni741f4hwp8isizcm8m8g-python2.7-rhodecode-enterprise-ce-4.19.3/lib/python2.7/site-packages/rhodecode/lib/vcs/backends/hg/repository.py", line 478, in get_commit
    raise CommitDoesNotExistError(msg)
CommitDoesNotExistError: Commit 8df8c32ad7d2581f630729f8e7f4d7df7e979863 does not exist for `.__shadow_repo_2_pr-448`