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