doccano init Applying django_celery_results.0007_remove_taskresult_hidden...Traceback

How to reproduce the problem
---------

```bash
doccano init
Setup Database.
Operations to perform:
Apply all migrations: admin, api, auth, authtoken, auto_labeling, contenttypes, data_export, data_import, django_celery_results, django_drf_filepond, examples, label_types, labels, projects, roles, sessions
Running migrations:
Applying django_celery_results.0007_remove_taskresult_hidden...Traceback (most recent call last):
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/utils.py", line 89, in _execute
return self.cursor.execute(sql, params)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/sqlite3/base.py", line 357, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: error in index django_celery_results_taskresult_hidden_cd77412f after drop column: no such column: hidden

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/11121901/data/anaconda3/envs/Py38/bin/doccano", line 8, in
sys.exit(main())
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/backend/cli.py", line 160, in main
args.handler(args)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/backend/cli.py", line 75, in command_db_init
management.call_command("migrate")
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/core/management/__init__.py", line 198, in call_command
return command.execute(*args, **defaults)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/core/management/base.py", line 448, in execute
output = self.handle(*args, **options)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/core/management/base.py", line 96, in wrapped
res = handle_func(*args, **kwargs)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 349, in handle
post_migrate_state = executor.migrate(
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/migrations/executor.py", line 135, in migrate
state = self._migrate_all_forwards(
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/migrations/executor.py", line 167, in _migrate_all_forwards
state = self.apply_migration(
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/migrations/executor.py", line 252, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/migrations/migration.py", line 130, in apply
operation.database_forwards(
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/migrations/operations/fields.py", line 170, in database_forwards
schema_editor.remove_field(
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/sqlite3/schema.py", line 417, in remove_field
super().remove_field(model, field)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 720, in remove_field
self.execute(sql)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 199, in execute
cursor.execute(sql, params)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/utils.py", line 67, in execute
return self._execute_with_wrappers(
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/utils.py", line 80, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/utils.py", line 89, in _execute
return self.cursor.execute(sql, params)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/utils.py", line 91, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/utils.py", line 89, in _execute
return self.cursor.execute(sql, params)
File "/home/11121901/data/anaconda3/envs/Py38/lib/python3.8/site-packages/django/db/backends/sqlite3/base.py", line 357, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: error in index django_celery_results_taskresult_hidden_cd77412f after drop column: no such column: hidden
```

Your Environment
---------

* Operating System: centos7
* Python Version Used: python3.8+
* When you install doccano: init
* How did you install doccano (Heroku button etc): pip install doccano