prompt: 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()
  
  ```
  
golden_diff: 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
  
verification_info: {"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"}]}