diff --git a/netbox_custom_objects/field_types.py b/netbox_custom_objects/field_types.py
index 060bc8e..1b07af4 100644
--- a/netbox_custom_objects/field_types.py
+++ b/netbox_custom_objects/field_types.py
@@ -14,16 +14,25 @@
 from django.utils.translation import gettext_lazy as _
 from extras.choices import CustomFieldTypeChoices, CustomFieldUIEditableChoices
 from utilities.api import get_serializer_for_model
-from utilities.forms.fields import (CSVChoiceField, CSVMultipleChoiceField,
-                                    DynamicChoiceField,
-                                    DynamicMultipleChoiceField, JSONField,
-                                    LaxURLField)
+from utilities.forms.fields import (
+    CSVChoiceField,
+    CSVMultipleChoiceField,
+    DynamicChoiceField,
+    DynamicMultipleChoiceField,
+    JSONField,
+    LaxURLField,
+)
 from utilities.forms.utils import add_blank_choice
-from utilities.forms.widgets import (APISelect, APISelectMultiple, DatePicker,
-                                     DateTimePicker)
+from utilities.forms.widgets import (
+    APISelect,
+    APISelectMultiple,
+    DatePicker,
+    DateTimePicker,
+)
 from utilities.templatetags.builtins.filters import linkify, render_markdown
 
 from netbox_custom_objects.constants import APP_LABEL
+from netbox_custom_objects.utilities import get_custom_object_type_id_from_content_type
 
 
 class FieldType:
@@ -335,8 +344,8 @@ def get_model_field(self, field, **kwargs):
         if content_type.app_label == APP_LABEL:
             from netbox_custom_objects.models import CustomObjectType
 
-            custom_object_type_id = content_type.model.replace("table", "").replace(
-                "model", ""
+            custom_object_type_id = get_custom_object_type_id_from_content_type(
+                content_type
             )
             custom_object_type = CustomObjectType.objects.get(pk=custom_object_type_id)
             model = custom_object_type.get_model()
@@ -358,12 +367,13 @@ def get_form_field(self, field, for_csv_import=False, **kwargs):
         content_type = ContentType.objects.get(pk=field.related_object_type_id)
 
         from utilities.forms.fields import DynamicModelChoiceField
+
         if content_type.app_label == APP_LABEL:
             # This is a custom object type
             from netbox_custom_objects.models import CustomObjectType
 
-            custom_object_type_id = content_type.model.replace("table", "").replace(
-                "model", ""
+            custom_object_type_id = get_custom_object_type_id_from_content_type(
+                content_type
             )
             custom_object_type = CustomObjectType.objects.get(pk=custom_object_type_id)
             model = custom_object_type.get_model()
@@ -569,9 +579,7 @@ def get_through_model(self, field, model=None):
 
         # Check if this is a self-referential M2M
         content_type = ContentType.objects.get(pk=field.related_object_type_id)
-        custom_object_type_id = content_type.model.replace("table", "").replace(
-            "model", ""
-        )
+        custom_object_type_id = get_custom_object_type_id_from_content_type(content_type)
         is_self_referential = (
             content_type.app_label == APP_LABEL
             and field.custom_object_type.id == custom_object_type_id
@@ -606,9 +614,7 @@ def get_model_field(self, field, **kwargs):
         """
         # Check if this is a self-referential M2M
         content_type = ContentType.objects.get(pk=field.related_object_type_id)
-        custom_object_type_id = content_type.model.replace("table", "").replace(
-            "model", ""
-        )
+        custom_object_type_id = get_custom_object_type_id_from_content_type(content_type)
         # TODO: Default does not auto-populate, to new or existing objects (should it?)
         kwargs.update({"default": field.default, "unique": field.unique})
 
@@ -649,8 +655,8 @@ def get_form_field(self, field, for_csv_import=False, **kwargs):
             # This is a custom object type
             from netbox_custom_objects.models import CustomObjectType
 
-            custom_object_type_id = content_type.model.replace("table", "").replace(
-                "model", ""
+            custom_object_type_id = get_custom_object_type_id_from_content_type(
+                content_type
             )
             custom_object_type = CustomObjectType.objects.get(pk=custom_object_type_id)
             model = custom_object_type.get_model()
@@ -711,8 +717,8 @@ def after_model_generation(self, instance, model, field_name):
         if content_type.app_label == APP_LABEL:
             from netbox_custom_objects.models import CustomObjectType
 
-            custom_object_type_id = content_type.model.replace("table", "").replace(
-                "model", ""
+            custom_object_type_id = get_custom_object_type_id_from_content_type(
+                content_type
             )
             custom_object_type = CustomObjectType.objects.get(pk=custom_object_type_id)
             to_model = custom_object_type.get_model()
@@ -753,8 +759,8 @@ def create_m2m_table(self, instance, model, field_name):
             if content_type.app_label == APP_LABEL:
                 from netbox_custom_objects.models import CustomObjectType
 
-                custom_object_type_id = content_type.model.replace("table", "").replace(
-                    "model", ""
+                custom_object_type_id = get_custom_object_type_id_from_content_type(
+                    content_type
                 )
                 custom_object_type = CustomObjectType.objects.get(
                     pk=custom_object_type_id
diff --git a/netbox_custom_objects/utilities.py b/netbox_custom_objects/utilities.py
index f7f6b32..2c85f09 100644
--- a/netbox_custom_objects/utilities.py
+++ b/netbox_custom_objects/utilities.py
@@ -4,6 +4,7 @@
 
 __all__ = (
     "AppsProxy",
+    "get_custom_object_type_id_from_content_type",
     "get_viewname",
 )
 
@@ -83,3 +84,7 @@ def get_viewname(model, action=None, rest_api=False):
             viewname = f"{viewname}_{action}"
 
     return viewname
+
+
+def get_custom_object_type_id_from_content_type(content_type):
+    return int(content_type.model.replace("table", "").replace("model", ""))