diff --git a/unsloth/models/_utils.py b/unsloth/models/_utils.py
index cd8dd6d0de..cef886e9a4 100644
--- a/unsloth/models/_utils.py
+++ b/unsloth/models/_utils.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2025.4.6"
+__version__ = "2025.4.7"
 
 __all__ = [
     "SUPPORTS_BFLOAT16",
diff --git a/unsloth/models/loader_utils.py b/unsloth/models/loader_utils.py
index 49baae55df..db81b5c5c6 100644
--- a/unsloth/models/loader_utils.py
+++ b/unsloth/models/loader_utils.py
@@ -110,7 +110,8 @@ def get_model_name(model_name, load_in_4bit = True):
     )
     # In the rare case, we convert bad model names to other names
     # For eg too large dynamic quants or MoEs
-    if new_model_name.lower() in BAD_MAPPINGS:
+    if new_model_name is not None and type(new_model_name) is str and \
+        new_model_name.lower() in BAD_MAPPINGS:
         new_model_name = BAD_MAPPINGS[new_model_name.lower()]
 
     if new_model_name is None and model_name.count("/") == 1 and model_name[0].isalnum():