| 5 |   | Traceback (most recent call last): | 
          
          
            | 6 |   |   File "manage.py", line 15, in <module> | 
          
          
            | 7 |   |     execute_from_command_line(sys.argv) | 
          
          
            | 8 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/core/management/__init__.py", line 381, in execute_from_command_line | 
          
          
            | 9 |   |     utility.execute() | 
          
          
            | 10 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/core/management/__init__.py", line 375, in execute | 
          
          
            | 11 |   |     self.fetch_command(subcommand).run_from_argv(self.argv) | 
          
          
            | 12 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/core/management/base.py", line 294, in run_from_argv | 
          
          
            | 13 |   |     self.execute(*args, **cmd_options) | 
          
          
            | 14 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/core/management/base.py", line 331, in execute | 
          
          
            | 15 |   |     output = self.handle(*args, **options) | 
          
          
            | 16 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/core/management/base.py", line 83, in wrapped | 
          
          
            | 17 |   |     res = handle_func(*args, **kwargs) | 
          
          
            | 18 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/core/management/commands/migrate.py", line 203, in handle | 
          
          
            | 19 |   |     fake_initial=fake_initial, | 
          
          
            | 20 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/migrations/executor.py", line 121, in migrate | 
          
          
            | 21 |   |     state = self._migrate_all_backwards(plan, full_plan, fake=fake) | 
          
          
            | 22 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/migrations/executor.py", line 196, in _migrate_all_backwards | 
          
          
            | 23 |   |     self.unapply_migration(states[migration], migration, fake=fake) | 
          
          
            | 24 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/migrations/executor.py", line 262, in unapply_migration | 
          
          
            | 25 |   |     state = migration.unapply(state, schema_editor) | 
          
          
            | 26 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/migrations/migration.py", line 175, in unapply | 
          
          
            | 27 |   |     operation.database_backwards(self.app_label, schema_editor, from_state, to_state) | 
          
          
            | 28 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/migrations/operations/models.py", line 377, in database_backwards | 
          
          
            | 29 |   |     self.database_forwards(app_label, schema_editor, from_state, to_state) | 
          
          
            | 30 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/migrations/operations/models.py", line 349, in database_forwards | 
          
          
            | 31 |   |     to_field, | 
          
          
            | 32 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/base/schema.py", line 508, in alter_field | 
          
          
            | 33 |   |     return self._alter_many_to_many(model, old_field, new_field, strict) | 
          
          
            | 34 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/base/schema.py", line 863, in _alter_many_to_many | 
          
          
            | 35 |   |     new_field.remote_field.through._meta.get_field(new_field.m2m_reverse_field_name()), | 
          
          
            | 36 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/base/schema.py", line 523, in alter_field | 
          
          
            | 37 |   |     old_db_params, new_db_params, strict) | 
          
          
            | 38 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/base/schema.py", line 605, in _alter_field | 
          
          
            | 39 |   |     self.execute(self._rename_field_sql(model._meta.db_table, old_field, new_field, new_type)) | 
          
          
            | 40 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/base/schema.py", line 133, in execute | 
          
          
            | 41 |   |     cursor.execute(sql, params) | 
          
          
            | 42 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/utils.py", line 100, in execute | 
          
          
            | 43 |   |     return super().execute(sql, params) | 
          
          
            | 44 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/utils.py", line 68, in execute | 
          
          
            | 45 |   |     return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) | 
          
          
            | 46 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/utils.py", line 77, in _execute_with_wrappers | 
          
          
            | 47 |   |     return executor(sql, params, many, context) | 
          
          
            | 48 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/utils.py", line 85, in _execute | 
          
          
            | 49 |   |     return self.cursor.execute(sql, params) | 
          
          
            | 50 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/utils.py", line 89, in __exit__ | 
          
          
            | 51 |   |     raise dj_exc_value.with_traceback(traceback) from exc_value | 
          
          
            | 52 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/utils.py", line 85, in _execute | 
          
          
            | 53 |   |     return self.cursor.execute(sql, params) | 
          
          
            | 54 |   |   File "/usr/local/lib/python3.6/dist-packages/Django-2.1.dev20180514000620-py3.6.egg/django/db/backends/mysql/base.py", line 71, in execute | 
          
          
            | 55 |   |     return self.cursor.execute(query, args) | 
          
          
            | 56 |   |   File "/usr/lib/python3/dist-packages/MySQLdb/cursors.py", line 250, in execute | 
          
          
            | 57 |   |     self.errorhandler(self, exc, value) | 
          
          
            | 58 |   |   File "/usr/lib/python3/dist-packages/MySQLdb/connections.py", line 50, in defaulterrorhandler | 
          
          
            | 59 |   |     raise errorvalue | 
          
          
            | 60 |   |   File "/usr/lib/python3/dist-packages/MySQLdb/cursors.py", line 247, in execute | 
          
          
            | 61 |   |     res = self._query(query) | 
          
          
            | 62 |   |   File "/usr/lib/python3/dist-packages/MySQLdb/cursors.py", line 411, in _query | 
          
          
            | 63 |   |     rowcount = self._do_query(q) | 
          
          
            | 64 |   |   File "/usr/lib/python3/dist-packages/MySQLdb/cursors.py", line 374, in _do_query | 
          
          
            | 65 |   |     db.query(q) | 
          
          
            | 66 |   |   File "/usr/lib/python3/dist-packages/MySQLdb/connections.py", line 292, in query | 
          
          
            | 67 |   |     _mysql.connection.query(self, query) |