We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Adding 'Offline Informasjonstekster' causes error
Not really sure what this does but it casts an error saying:

Exception Type:     IntegrityError
Exception Value:    column key is not unique


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `apps/offline/admin.py`
Content:
```
1 from apps.offline.models import ProxyChunk, Issue
2 from chunks.models import Chunk
3 from django.contrib import admin
4 from django.db.models import Q
5 
6 
7 class ProxyChunkAdmin(admin.ModelAdmin):
8 
9     readonly_fields = ['key']
10 
11     def queryset(self, request):
12         offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))
13         return offline
14 
15 admin.site.register(ProxyChunk, ProxyChunkAdmin)
16 admin.site.register(Issue)
17
```
--- 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/apps/offline/admin.py b/apps/offline/admin.py
--- a/apps/offline/admin.py
+++ b/apps/offline/admin.py
@@ -8,6 +8,9 @@
 
     readonly_fields = ['key']
 
+    def has_add_permission(self, request):
+        return False
+
     def queryset(self, request):
         offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))
         return offline

{"golden_diff": "diff --git a/apps/offline/admin.py b/apps/offline/admin.py\n--- a/apps/offline/admin.py\n+++ b/apps/offline/admin.py\n@@ -8,6 +8,9 @@\n \n     readonly_fields = ['key']\n \n+    def has_add_permission(self, request):\n+        return False\n+\n     def queryset(self, request):\n         offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))\n         return offline\n", "issue": "Adding 'Offline Informasjonstekster' causes error\nNot really sure what this does but it casts an error saying:\n\nException Type:     IntegrityError\nException Value:    column key is not unique\n\n", "before_files": [{"content": "from apps.offline.models import ProxyChunk, Issue\nfrom chunks.models import Chunk\nfrom django.contrib import admin\nfrom django.db.models import Q\n\n\nclass ProxyChunkAdmin(admin.ModelAdmin):\n\n    readonly_fields = ['key']\n\n    def queryset(self, request):\n        offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))\n        return offline\n\nadmin.site.register(ProxyChunk, ProxyChunkAdmin)\nadmin.site.register(Issue)\n", "path": "apps/offline/admin.py"}], "after_files": [{"content": "from apps.offline.models import ProxyChunk, Issue\nfrom chunks.models import Chunk\nfrom django.contrib import admin\nfrom django.db.models import Q\n\n\nclass ProxyChunkAdmin(admin.ModelAdmin):\n\n    readonly_fields = ['key']\n\n    def has_add_permission(self, request):\n        return False\n\n    def queryset(self, request):\n        offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))\n        return offline\n\nadmin.site.register(ProxyChunk, ProxyChunkAdmin)\nadmin.site.register(Issue)\n", "path": "apps/offline/admin.py"}]}