diff --git a/adhocracy4/categories/fields.py b/adhocracy4/categories/fields.py
index ead5b081f..16d4de246 100644
--- a/adhocracy4/categories/fields.py
+++ b/adhocracy4/categories/fields.py
@@ -1,7 +1,6 @@
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
-from adhocracy4.categories.form_fields import CategoryChoiceField
 from adhocracy4.categories.models import Category
 
 
@@ -17,8 +16,3 @@ def __init__(self, *args, **kwargs):
         }
         defaults.update(kwargs)
         super().__init__(**defaults)
-
-    def formfield(self, **kwargs):
-        form_class = kwargs.get("form_class", CategoryChoiceField)
-        kwargs["form_class"] = form_class
-        return super().formfield(**kwargs)
diff --git a/adhocracy4/categories/form_fields.py b/adhocracy4/categories/form_fields.py
index 05251c66a..08c53a587 100644
--- a/adhocracy4/categories/form_fields.py
+++ b/adhocracy4/categories/form_fields.py
@@ -1,34 +1,10 @@
-from collections import abc
-
 from django import forms
+from django.conf import settings
 from django.forms import widgets
-from django.utils.functional import cached_property
 
 from adhocracy4.categories import get_category_icon_url
 
 
-class CategoryIconDict(abc.Mapping):
-    def __init__(self, field):
-        self.field = field
-        self.queryset = field.queryset
-
-    @cached_property
-    def _icons(self):
-        return {
-            self.field.prepare_value(obj): getattr(obj, "icon", None)
-            for obj in self.queryset.all()
-        }
-
-    def __getitem__(self, key):
-        return self._icons.__getitem__(key)
-
-    def __iter__(self):
-        return self._icons.__iter__()
-
-    def __len__(self):
-        return self._icons.__len__()
-
-
 class CategorySelectWidget(widgets.Select):
     def get_context(self, name, value, attrs):
         context = super().get_context(name, value, attrs)
@@ -40,30 +16,24 @@ def get_context(self, name, value, attrs):
 
     def create_option(self, name, value, label, selected, index, **kwargs):
         option = super().create_option(name, value, label, selected, index, **kwargs)
-        if hasattr(value, "value") and value.value in self.icons:
-            icon_url = get_category_icon_url(self.icons[value.value])
+        if value in self.icons:
+            icon_url = get_category_icon_url(value)
             option["attrs"]["data-icon-src"] = icon_url
 
         return option
 
 
-class CategoryChoiceField(forms.ModelChoiceField):
+class CategoryChoiceField(forms.ChoiceField):
     widget = CategorySelectWidget
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.widget.icons = self.icons
+        self.choices = getattr(settings, "A4_CATEGORY_ICONS", [])
 
     @property
     def icons(self):
-        return CategoryIconDict(self)
-
-    # Update the icons if the queryset is updated
-    def _set_queryset(self, queryset):
-        super()._set_queryset(queryset)
-        self.widget.icons = self.icons
-
-    queryset = property(forms.ModelChoiceField._get_queryset, _set_queryset)
+        return dict(self.choices)
 
 
 class IconSelectWidget(widgets.Select):
diff --git a/adhocracy4/categories/forms.py b/adhocracy4/categories/forms.py
index 55ba172db..513e0a042 100644
--- a/adhocracy4/categories/forms.py
+++ b/adhocracy4/categories/forms.py
@@ -7,6 +7,7 @@
 from adhocracy4.modules import models as module_models
 
 from . import has_icons
+from .form_fields import CategoryChoiceField
 
 
 class CategorizableFieldMixin:
@@ -50,6 +51,7 @@ def __init__(self, module, *args, **kwargs):
             del self.fields["icon"]
 
     name = forms.CharField(widget=forms.TextInput(attrs={"placeholder": _("Category")}))
+    icon = CategoryChoiceField()
 
     class Media:
         js = ("category_formset.js",)
diff --git a/adhocracy4/categories/models.py b/adhocracy4/categories/models.py
index 38d0e165e..391971bd9 100644
--- a/adhocracy4/categories/models.py
+++ b/adhocracy4/categories/models.py
@@ -1,4 +1,3 @@
-from django.conf import settings
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
@@ -13,15 +12,6 @@ def __init__(self, *args, **kwargs):
         kwargs["blank"] = True
         super().__init__(*args, **kwargs)
 
-    def contribute_to_class(self, cls, name, **kwargs):
-        """Initialize icon choices from the settings if they exist."""
-
-        if hasattr(settings, "A4_CATEGORY_ICONS"):
-            self.choices = settings.A4_CATEGORY_ICONS
-
-        # Call the super method at last so that choices are already initialized
-        super().contribute_to_class(cls, name, **kwargs)
-
     def formfield(self, **kwargs):
         form_class = kwargs.get("choices_form_class", IconChoiceField)
         kwargs["choices_form_class"] = form_class
diff --git a/changelog/0006.md b/changelog/0006.md
new file mode 100644
index 000000000..77414e4ef
--- /dev/null
+++ b/changelog/0006.md
@@ -0,0 +1,4 @@
+### Changed
+
+- apps/categories: change CategoryChoiceField for icons from moded field to simple field  
+  (was creating migrations in forked projects)