Issue: https://github.com/apache/airflow/issues/27135

airflow db upgrade returns below error:

Traceback (most recent call last):
  File "/Users/panksingh/Documents/workspace/airflow-plugins/venv/bin/airflow",
line 8, in <module>
    sys.exit(main())
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/__main__.py",
line 38, in main
    args.func(args)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/cli/cli_parser.py",
line 51, in command
    return func(*args, **kwargs)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/utils/cli.py",
line 99, in wrapper
    return f(*args, **kwargs)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/cli/commands/db_command.py",
line 82, in upgradedb
    db.upgradedb(to_revision=to_revision, from_revision=from_revision,
show_sql_only=args.show_sql_only)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/utils/session.py",
line 71, in wrapper
    return func(*args, session=session, **kwargs)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/utils/db.py",
line 1446, in upgradedb
    command.upgrade(config, revision=to_revision or 'heads')
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/command.py",
line 294, in upgrade
    script.run_env()
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/script/base.py",
line 490, in run_env
    util.load_python_file(self.dir, "env.py")
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/util/pyfiles.py",
line 97, in load_python_file
    module = load_module_py(module_id, path)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/util/compat.py",
line 182, in load_module_py
    spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/migrations/env.py",
line 107, in <module>
    run_migrations_online()
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/airflow/migrations/env.py",
line 101, in run_migrations_online
    context.run_migrations()
  File "<string>", line 8, in run_migrations
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/runtime/environment.py",
line 813, in run_migrations
    self.get_context().run_migrations(**kw)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/runtime/migration.py",
line 548, in run_migrations
    for step in self._migrations_fn(heads, self):
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/command.py",
line 283, in upgrade
    return script._upgrade_revs(revision, rev)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/script/base.py",
line 365, in _upgrade_revs
    revs = list(revs)
  File 
"/Users/panksingh/Documents/workspace/airflow-plugins/venv/lib/python3.7/site-packages/alembic/script/revision.py",
line 1040, in _iterate_revisions
    total_space.remove(rev.revision)
KeyError: '75d5ed6c2b43'

Can someone help here?

-- 

Thanks and Regards,

Pankaj Singh

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