diff --git a/__init__.py b/__init__.py
index 817ec7f..db46034 100644
--- a/__init__.py
+++ b/__init__.py
@@ -704,7 +704,10 @@ class FONT3D_OT_SaveFontToFile(bpy.types.Operator):
         with bpy.context.temp_override(**context_override):
             filepath = f"{preferences.assets_dir}/fonts/{selected_font.font_name}.gltf"
             # get rid of scene extra data before export
+            scene_keys = []
             for k in bpy.context.scene.keys():
+                scene_keys.append(k)
+            for k in scene_keys:
                 del bpy.context.scene[k]
 
             # save as gltf