我有Django代码，并且运行良好，但是当我运行manage.py时，它会引发一个我不理解的错误：
Operations to perform:
Apply all migrations: admin, api, auth, contenttypes, sessions, social_django
Running migrations:
Applying api.0004_auto_20190726_1113...Traceback (most recent call last):
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\sqlite3\base.py", line 298, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: near ")": syntax error
上述异常是以下异常的直接原因：
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
utility.execute()
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\core\management\__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\core\management\base.py", line 316, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\core\management\base.py", line 353, in execute
output = self.handle(*args, **options)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\core\management\base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\core\management\commands\migrate.py", line 203, in handle
fake_initial=fake_initial,
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\migrations\executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\migrations\operations\fields.py", line 150, in database_forwards
schema_editor.remove_field(from_model, from_model._meta.get_field(self.name))
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\sqlite3\schema.py", line 327, in remove_field
self._remake_table(model, delete_field=field)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\sqlite3\schema.py", line 274, in _remake_table
self.quote_name(model._meta.db_table),
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\base\schema.py", line 133, in execute
cursor.execute(sql, params)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\utils.py", line 100, in execute
return super().execute(sql, params)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\santhoshe.e\AppData\Local\Continuum\anaconda3\lib\site-packages\django\db\backends\sqlite3\base.py", line 298, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: near ")": syntax error
0004_auto_20190726_111：
from django.db import migrations, models
class Migration(migrations.Migration):
dependencies = [
('api', '0003_support_sql_server'),
]
operations = [
migrations.AlterUniqueTogether(
name='seq2seqannotation',
unique_together=set(),
),
migrations.RemoveField(
model_name='seq2seqannotation',
name='document',
),
migrations.RemoveField(
model_name='seq2seqannotation',
name='user',
),
migrations.RemoveField(
model_name='seq2seqproject',
name='project_ptr',
),
migrations.AlterUniqueTogether(
name='sequenceannotation',
unique_together=set(),
),
migrations.RemoveField(
model_name='sequenceannotation',
name='document',
),
migrations.RemoveField(
model_name='sequenceannotation',
name='label',
),
migrations.RemoveField(
model_name='sequenceannotation',
name='user',
),
migrations.RemoveField(
model_name='sequencelabelingproject',
name='project_ptr',
),
migrations.AlterField(
model_name='project',
name='project_type',
field=models.CharField(choices=[('DocumentClassification', 'document classification')], max_length=30),
),
migrations.DeleteModel(
name='Seq2seqAnnotation',
),
migrations.DeleteModel(
name='Seq2seqProject',
),
migrations.DeleteModel(
name='SequenceAnnotation',
),
migrations.DeleteModel(
name='SequenceLabelingProject',
),
]
我不了解此错误，也无法了解需要在哪里更改代码。有人可以建议我在哪里更改代码？