We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Mark rules error for anonymous users on events
'AnonymousUser' object has no attribute 'mark_rules'


--- 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/events/forms.py`
Content:
```
1 from django import forms
2 from captcha.fields import CaptchaField
3 
4 class CaptchaForm(forms.Form):
5     def __init__(self, *args, **kwargs):
6         user = kwargs.pop('user', None)
7         super(CaptchaForm, self).__init__(*args, **kwargs)
8         # Removing mark rules field if user has already accepted the rules
9         if user and  user.mark_rules:
10             del self.fields['mark_rules']
11     mark_rules = forms.BooleanField(label=u'Jeg godtar <a href="/profile/#marks" target="_blank">prikkreglene</a>')
12     captcha = CaptchaField()
13
```
--- 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/events/forms.py b/apps/events/forms.py
--- a/apps/events/forms.py
+++ b/apps/events/forms.py
@@ -6,7 +6,7 @@
         user = kwargs.pop('user', None)
         super(CaptchaForm, self).__init__(*args, **kwargs)
         # Removing mark rules field if user has already accepted the rules
-        if user and  user.mark_rules:
+        if user and user.is_authenticated() and user.mark_rules:
             del self.fields['mark_rules']
     mark_rules = forms.BooleanField(label=u'Jeg godtar <a href="/profile/#marks" target="_blank">prikkreglene</a>')
     captcha = CaptchaField()

{"golden_diff": "diff --git a/apps/events/forms.py b/apps/events/forms.py\n--- a/apps/events/forms.py\n+++ b/apps/events/forms.py\n@@ -6,7 +6,7 @@\n         user = kwargs.pop('user', None)\n         super(CaptchaForm, self).__init__(*args, **kwargs)\n         # Removing mark rules field if user has already accepted the rules\n-        if user and  user.mark_rules:\n+        if user and user.is_authenticated() and user.mark_rules:\n             del self.fields['mark_rules']\n     mark_rules = forms.BooleanField(label=u'Jeg godtar <a href=\"/profile/#marks\" target=\"_blank\">prikkreglene</a>')\n     captcha = CaptchaField()\n", "issue": "Mark rules error for anonymous users on events\n'AnonymousUser' object has no attribute 'mark_rules'\n\n", "before_files": [{"content": "from django import forms\nfrom captcha.fields import CaptchaField\n\nclass CaptchaForm(forms.Form):\n    def __init__(self, *args, **kwargs):\n        user = kwargs.pop('user', None)\n        super(CaptchaForm, self).__init__(*args, **kwargs)\n        # Removing mark rules field if user has already accepted the rules\n        if user and  user.mark_rules:\n            del self.fields['mark_rules']\n    mark_rules = forms.BooleanField(label=u'Jeg godtar <a href=\"/profile/#marks\" target=\"_blank\">prikkreglene</a>')\n    captcha = CaptchaField()\n", "path": "apps/events/forms.py"}], "after_files": [{"content": "from django import forms\nfrom captcha.fields import CaptchaField\n\nclass CaptchaForm(forms.Form):\n    def __init__(self, *args, **kwargs):\n        user = kwargs.pop('user', None)\n        super(CaptchaForm, self).__init__(*args, **kwargs)\n        # Removing mark rules field if user has already accepted the rules\n        if user and user.is_authenticated() and user.mark_rules:\n            del self.fields['mark_rules']\n    mark_rules = forms.BooleanField(label=u'Jeg godtar <a href=\"/profile/#marks\" target=\"_blank\">prikkreglene</a>')\n    captcha = CaptchaField()\n", "path": "apps/events/forms.py"}]}