Api tests failing and producing alembic.util.exec.CommandError

[ahmedhamidawan]

Describe the bug
Api tests fail and produce the following alembic.util.exec.CommandError for each test case:
alembic.util.exc.CommandError: Multiple heads are present; please specify a single target revision

Galaxy Version and/or server at which you observed the bug
Galaxy Version: dev
Commit:

To Reproduce
Steps to reproduce the behavior:

1. Run any api test, for e.g.: sh run_tests.sh -api lib/galaxy_test/api/test_history_contents.py
2. All tests fail with the same error: ERROR lib/galaxy_test/api/test_history_contents.py::TestHistoryContentsApi::test_hdca_from_library_datasets - alembic.util.exc.CommandError: Multiple heads are present; please specify a single target revision

Only experienced on dev, not on 23.0

[jdavcs]

Confirmed: reproduced locally. Relevant traceback:

    @classmethod
    def setup_class(cls):
>       cls.setUpClass()

lib/galaxy/util/unittest.py:19: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
lib/galaxy_test/base/testcase.py:53: in setUpClass
    cls._test_driver.setup(config_object=cls)
lib/galaxy_test/driver/driver_util.py:910: in setup
    self._register_and_run_servers(config_object)
lib/galaxy_test/driver/driver_util.py:965: in _register_and_run_servers
    server_wrapper = launch_server(
lib/galaxy_test/driver/driver_util.py:800: in launch_server
    app = app_factory()
lib/galaxy_test/driver/driver_util.py:966: in <lambda>
    app_factory=lambda: self.build_galaxy_app(galaxy_config),
lib/galaxy_test/driver/driver_util.py:978: in build_galaxy_app
    self.app = build_galaxy_app(galaxy_config)
lib/galaxy_test/driver/driver_util.py:584: in build_galaxy_app
    app = GalaxyUniverseApplication(**simple_kwargs)
lib/galaxy/app.py:600: in __init__
    super().__init__(fsmon=True, **kwargs)
lib/galaxy/app.py:495: in __init__
    super().__init__(**kwargs)
lib/galaxy/app.py:244: in __init__
    self._configure_models(check_migrate_databases=self.config.check_migrate_databases, config_file=config_file)
lib/galaxy/app.py:429: in _configure_models
    self._verify_databases(engine, install_engine, combined_install_database)
lib/galaxy/app.py:453: in _verify_databases
    verify_databases(
lib/galaxy/model/migrations/__init__.py:157: in verify_databases
    gxy_verifier.run()
lib/galaxy/model/migrations/__init__.py:209: in run
    if self._handle_no_database():
lib/galaxy/model/migrations/__init__.py:226: in _handle_no_database
    self._initialize_database()
lib/galaxy/model/migrations/__init__.py:314: in _initialize_database
    self.alembic_manager.stamp_model_head(self.model)
lib/galaxy/model/migrations/__init__.py:73: in stamp_model_head
    self.stamp_revision(revision)
lib/galaxy/model/migrations/base.py:315: in stamp_revision
    command.stamp(self.alembic_cfg, revision) 
...
E           alembic.util.exc.CommandError: Multiple heads are present; please specify a single target revision

.venv/lib/python3.10/site-packages/alembic/script/base.py:259: CommandErr

[bernt-matthias]

#15771