.../bin/python manage.py db migrate
INFO  [alembic.runtime.migration] Context impl CockroachDBImpl.
INFO  [alembic.runtime.migration] Will assume non-transactional DDL.
.../lib/python3.7/site-packages/cockroachdb/sqlalchemy/dialect.py:140: SAWarning: Could not parse type name 'character varying'
  warn("Could not parse type name '%s'" % type_str)
Traceback (most recent call last):
  File "manage.py", line 25, in <module>
    manager.run()
  File ".../lib/python3.7/site-packages/flask_script/__init__.py", line 417, in run
    result = self.handle(argv[0], argv[1:])
  File ".../lib/python3.7/site-packages/flask_script/__init__.py", line 386, in handle
    res = handle(*args, **config)
  File ".../lib/python3.7/site-packages/flask_script/commands.py", line 216, in __call__
    return self.run(*args, **kwargs)
  File ".../lib/python3.7/site-packages/flask_migrate/__init__.py", line 95, in wrapped
    f(*args, **kwargs)
  File ".../lib/python3.7/site-packages/flask_migrate/__init__.py", line 215, in migrate
    version_path=version_path, rev_id=rev_id)
  File ".../lib/python3.7/site-packages/alembic/command.py", line 176, in revision
    script_directory.run_env()
  File ".../lib/python3.7/site-packages/alembic/script/base.py", line 427, in run_env
    util.load_python_file(self.dir, 'env.py')
  File ".../lib/python3.7/site-packages/alembic/util/pyfiles.py", line 81, in load_python_file
    module = load_module_py(module_id, path)
  File ".../lib/python3.7/site-packages/alembic/util/compat.py", line 82, 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 "flask_migrations/env.py", line 88, in <module>
    run_migrations_online()
  File "flask_migrations/env.py", line 81, in run_migrations_online
    context.run_migrations()
  File "<string>", line 8, in run_migrations
  File ".../lib/python3.7/site-packages/alembic/runtime/environment.py", line 836, in run_migrations
    self.get_context().run_migrations(**kw)
  File ".../lib/python3.7/site-packages/alembic/runtime/migration.py", line 321, in run_migrations
    for step in self._migrations_fn(heads, self):
  File ".../lib/python3.7/site-packages/alembic/command.py", line 156, in retrieve_migrations
    revision_context.run_autogenerate(rev, context)
  File ".../lib/python3.7/site-packages/alembic/autogenerate/api.py", line 415, in run_autogenerate
    self._run_environment(rev, migration_context, True)
  File ".../lib/python3.7/site-packages/alembic/autogenerate/api.py", line 451, in _run_environment
    autogen_context, migration_script)
  File ".../lib/python3.7/site-packages/alembic/autogenerate/compare.py", line 22, in _populate_migration_script
    _produce_net_changes(autogen_context, upgrade_ops)
  File ".../lib/python3.7/site-packages/alembic/autogenerate/compare.py", line 48, in _produce_net_changes
    autogen_context, upgrade_ops, schemas
  File ".../lib/python3.7/site-packages/alembic/util/langhelpers.py", line 313, in go
    fn(*arg, **kw)
  File ".../lib/python3.7/site-packages/alembic/autogenerate/compare.py", line 75, in _autogen_for_tables
    inspector, upgrade_ops, autogen_context)
  File ".../lib/python3.7/site-packages/alembic/autogenerate/compare.py", line 168, in _compare_tables
    inspector.reflecttable(t, None)
  File ".../lib/python3.7/site-packages/sqlalchemy/engine/reflection.py", line 618, in reflecttable
    table_name, schema, **table.dialect_kwargs):
  File ".../lib/python3.7/site-packages/sqlalchemy/engine/reflection.py", line 369, in get_columns
    **kw)
  File ".../lib/python3.7/site-packages/cockroachdb/sqlalchemy/dialect.py", line 141, in get_columns
    typ = sqltypes.NULLTYPE()
TypeError: <flask_script.commands.Command object at 0x1053d7dd8>: 'NullType' object is not callable

Process finished with exit code 1