diff --git a/mypy_django_plugin/django/context.py b/mypy_django_plugin/django/context.py
index 85d8bbc4a..3faa9edf0 100644
--- a/mypy_django_plugin/django/context.py
+++ b/mypy_django_plugin/django/context.py
@@ -141,8 +141,6 @@ def get_field_lookup_exact_type(
     ) -> MypyType:
         if isinstance(field, (RelatedField, ForeignObjectRel)):
             related_model_cls = self.get_field_related_model_cls(field)
-            if related_model_cls is None:
-                return AnyType(TypeOfAny.from_error)
             primary_key_field = self.get_primary_key_field(related_model_cls)
             primary_key_type = self.get_field_get_type(api, primary_key_field, method="init")
 
@@ -225,9 +223,6 @@ def get_field_set_type_from_model_type_info(info: Optional[TypeInfo], field_name
                         continue
 
                     related_model = self.get_field_related_model_cls(field)
-                    if related_model is None:
-                        expected_types[field_name] = AnyType(TypeOfAny.from_error)
-                        continue
 
                     if related_model._meta.proxy_for_model is not None:
                         related_model = related_model._meta.proxy_for_model
@@ -327,8 +322,6 @@ def get_field_get_type(
         is_nullable = self.get_field_nullability(field, method)
         if isinstance(field, RelatedField):
             related_model_cls = self.get_field_related_model_cls(field)
-            if related_model_cls is None:
-                return AnyType(TypeOfAny.from_error)
 
             if method in ("values", "values_list"):
                 primary_key_field = self.get_primary_key_field(related_model_cls)
@@ -354,7 +347,7 @@ def get_field_related_model_cls(self, field: Union["RelatedField[Any, Any]", For
                 related_model_cls = field.model
             elif "." not in related_model_cls:
                 # same file model
-                related_model_fullname = field.model.__module__ + "." + related_model_cls
+                related_model_fullname = f"{field.model.__module__}.{related_model_cls}"
                 related_model_cls = self.get_model_class_by_fullname(related_model_fullname)
                 if related_model_cls is None:
                     raise UnregisteredModelError
@@ -368,7 +361,7 @@ def get_field_related_model_cls(self, field: Union["RelatedField[Any, Any]", For
 
     def _resolve_field_from_parts(
         self, field_parts: Iterable[str], model_cls: Type[Model]
-    ) -> Union["Field[Any, Any]", ForeignObjectRel, None]:
+    ) -> Union["Field[Any, Any]", ForeignObjectRel]:
         currently_observed_model = model_cls
         field: Union["Field[Any, Any]", ForeignObjectRel, GenericForeignKey, None] = None
         for field_part in field_parts:
@@ -378,19 +371,13 @@ def _resolve_field_from_parts(
 
             field = currently_observed_model._meta.get_field(field_part)
             if isinstance(field, RelatedField):
-                related_model = self.get_field_related_model_cls(field)
-                if related_model is None:
-                    return None
-                currently_observed_model = related_model
+                currently_observed_model = self.get_field_related_model_cls(field)
                 model_name = currently_observed_model._meta.model_name
                 if model_name is not None and field_part == (model_name + "_id"):
                     field = self.get_primary_key_field(currently_observed_model)
 
             if isinstance(field, ForeignObjectRel):
-                related_model = self.get_field_related_model_cls(field)
-                if related_model is None:
-                    return None
-                currently_observed_model = related_model
+                currently_observed_model = self.get_field_related_model_cls(field)
 
         # Guaranteed by `query.solve_lookup_type` before.
         assert isinstance(field, (Field, ForeignObjectRel))
@@ -422,13 +409,10 @@ def solve_lookup_type(
         if len(query_parts) == 1:
             return [], [query_parts[0]], False
 
-        related_model = None
-        if isinstance(field, (RelatedField, ForeignObjectRel)):
-            related_model = self.get_field_related_model_cls(field)
-
-        if related_model is None:
+        if not isinstance(field, (RelatedField, ForeignObjectRel)):
             return None
 
+        related_model = self.get_field_related_model_cls(field)
         sub_query = Query(related_model).solve_lookup_type("__".join(query_parts[1:]))
         entire_query_parts = [query_parts[0], *sub_query[1]]
         return sub_query[0], entire_query_parts, sub_query[2]
@@ -460,8 +444,6 @@ def resolve_lookup_expected_type(self, ctx: MethodContext, model_cls: Type[Model
             return AnyType(TypeOfAny.explicit)
 
         field = self._resolve_field_from_parts(field_parts, model_cls)
-        if field is None:
-            return AnyType(TypeOfAny.from_error)
 
         lookup_cls = None
         if lookup_parts:
diff --git a/mypy_django_plugin/transformers/models.py b/mypy_django_plugin/transformers/models.py
index f534ce408..78dc96739 100644
--- a/mypy_django_plugin/transformers/models.py
+++ b/mypy_django_plugin/transformers/models.py
@@ -448,8 +448,6 @@ def run_with_model_cls(self, model_cls: Type[Model]) -> None:
                 continue
 
             related_model_cls = self.django_context.get_field_related_model_cls(relation)
-            if related_model_cls is None:
-                continue
 
             try:
                 related_model_info = self.lookup_class_typeinfo_or_incomplete_defn_error(related_model_cls)
diff --git a/mypy_django_plugin/transformers/querysets.py b/mypy_django_plugin/transformers/querysets.py
index 8499aedc7..5ba3c6810 100644
--- a/mypy_django_plugin/transformers/querysets.py
+++ b/mypy_django_plugin/transformers/querysets.py
@@ -63,8 +63,6 @@ def get_field_type_from_lookup(
         lookup_field, ForeignObjectRel
     ):
         related_model_cls = django_context.get_field_related_model_cls(lookup_field)
-        if related_model_cls is None:
-            return AnyType(TypeOfAny.from_error)
         lookup_field = django_context.get_primary_key_field(related_model_cls)
 
     field_get_type = django_context.get_field_get_type(helpers.get_typechecker_api(ctx), lookup_field, method=method)