We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Database table for SpanType has invalid name 
How to reproduce the behaviour
---------
- Pull latest changes from master
- ./manage.py migrate
- ./api/migrations/0033_auto_20220127_0654.py will migrate the database table for `SpanType` to `label_types_spanType`
- Delete a project `Project.objects.first().delete()``

Exception:

<img width="511" alt="image" src="https://user-images.githubusercontent.com/6747788/152384221-a6a549b8-1cca-49c0-86e4-6a20f7d0a266.png">
 
The issue can be resolved by either renaming db table `label_types_spanType` to `label_types_spantype` or by explicitly setting `tb_table` for SpanType model like this: `db_table = "label_types_spanType"`

Your Environment
---------
*   Operating System: macOS Monterey, doccano is locally executed
*   Python Version Used: 3.9


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `backend/api/migrations/0033_auto_20220127_0654.py`
Content:
```
1 # Generated by Django 3.2.11 on 2022-01-27 06:54
2 
3 from django.db import migrations
4 
5 
6 class Migration(migrations.Migration):
7 
8     dependencies = [
9         ('labels', '0003_auto_20220127_0654'),
10         ('api', '0032_auto_20220127_0654'),
11     ]
12 
13     operations = [
14         migrations.SeparateDatabaseAndState(
15             state_operations=[
16                 migrations.DeleteModel(
17                     name='CategoryType',
18                 ),
19                 migrations.DeleteModel(
20                     name='RelationTypes',
21                 ),
22                 migrations.DeleteModel(
23                     name='SpanType',
24                 ),
25             ],
26             database_operations=[
27                 migrations.AlterModelTable(
28                     name='CategoryType',
29                     table='label_types_categorytype'
30                 ),
31                 migrations.AlterModelTable(
32                     name='RelationTypes',
33                     table='label_types_relationtypes'
34                 ),
35                 migrations.AlterModelTable(
36                     name='SpanType',
37                     table='label_types_spanType'
38                 )
39             ]
40         )
41     ]
42
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/backend/api/migrations/0033_auto_20220127_0654.py b/backend/api/migrations/0033_auto_20220127_0654.py
--- a/backend/api/migrations/0033_auto_20220127_0654.py
+++ b/backend/api/migrations/0033_auto_20220127_0654.py
@@ -34,7 +34,7 @@
                 ),
                 migrations.AlterModelTable(
                     name='SpanType',
-                    table='label_types_spanType'
+                    table='label_types_spantype'
                 )
             ]
         )

{"golden_diff": "diff --git a/backend/api/migrations/0033_auto_20220127_0654.py b/backend/api/migrations/0033_auto_20220127_0654.py\n--- a/backend/api/migrations/0033_auto_20220127_0654.py\n+++ b/backend/api/migrations/0033_auto_20220127_0654.py\n@@ -34,7 +34,7 @@\n                 ),\n                 migrations.AlterModelTable(\n                     name='SpanType',\n-                    table='label_types_spanType'\n+                    table='label_types_spantype'\n                 )\n             ]\n         )\n", "issue": "Database table for SpanType has invalid name \nHow to reproduce the behaviour\r\n---------\r\n- Pull latest changes from master\r\n- ./manage.py migrate\r\n- ./api/migrations/0033_auto_20220127_0654.py will migrate the database table for `SpanType` to `label_types_spanType`\r\n- Delete a project `Project.objects.first().delete()``\r\n\r\nException:\r\n\r\n<img width=\"511\" alt=\"image\" src=\"https://user-images.githubusercontent.com/6747788/152384221-a6a549b8-1cca-49c0-86e4-6a20f7d0a266.png\">\r\n \r\nThe issue can be resolved by either renaming db table `label_types_spanType` to `label_types_spantype` or by explicitly setting `tb_table` for SpanType model like this: `db_table = \"label_types_spanType\"`\r\n\r\nYour Environment\r\n---------\r\n*   Operating System: macOS Monterey, doccano is locally executed\r\n*   Python Version Used: 3.9\r\n\n", "before_files": [{"content": "# Generated by Django 3.2.11 on 2022-01-27 06:54\n\nfrom django.db import migrations\n\n\nclass Migration(migrations.Migration):\n\n    dependencies = [\n        ('labels', '0003_auto_20220127_0654'),\n        ('api', '0032_auto_20220127_0654'),\n    ]\n\n    operations = [\n        migrations.SeparateDatabaseAndState(\n            state_operations=[\n                migrations.DeleteModel(\n                    name='CategoryType',\n                ),\n                migrations.DeleteModel(\n                    name='RelationTypes',\n                ),\n                migrations.DeleteModel(\n                    name='SpanType',\n                ),\n            ],\n            database_operations=[\n                migrations.AlterModelTable(\n                    name='CategoryType',\n                    table='label_types_categorytype'\n                ),\n                migrations.AlterModelTable(\n                    name='RelationTypes',\n                    table='label_types_relationtypes'\n                ),\n                migrations.AlterModelTable(\n                    name='SpanType',\n                    table='label_types_spanType'\n                )\n            ]\n        )\n    ]\n", "path": "backend/api/migrations/0033_auto_20220127_0654.py"}], "after_files": [{"content": "# Generated by Django 3.2.11 on 2022-01-27 06:54\n\nfrom django.db import migrations\n\n\nclass Migration(migrations.Migration):\n\n    dependencies = [\n        ('labels', '0003_auto_20220127_0654'),\n        ('api', '0032_auto_20220127_0654'),\n    ]\n\n    operations = [\n        migrations.SeparateDatabaseAndState(\n            state_operations=[\n                migrations.DeleteModel(\n                    name='CategoryType',\n                ),\n                migrations.DeleteModel(\n                    name='RelationTypes',\n                ),\n                migrations.DeleteModel(\n                    name='SpanType',\n                ),\n            ],\n            database_operations=[\n                migrations.AlterModelTable(\n                    name='CategoryType',\n                    table='label_types_categorytype'\n                ),\n                migrations.AlterModelTable(\n                    name='RelationTypes',\n                    table='label_types_relationtypes'\n                ),\n                migrations.AlterModelTable(\n                    name='SpanType',\n                    table='label_types_spantype'\n                )\n            ]\n        )\n    ]\n", "path": "backend/api/migrations/0033_auto_20220127_0654.py"}]}