diff --git a/plugins/3MFReader/ThreeMFWorkspaceReader.py b/plugins/3MFReader/ThreeMFWorkspaceReader.py
index 65896b3ec7..77a7da8b6a 100755
--- a/plugins/3MFReader/ThreeMFWorkspaceReader.py
+++ b/plugins/3MFReader/ThreeMFWorkspaceReader.py
@@ -269,7 +269,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
         # if the global stack is found, we check if there are conflicts in the extruder stacks
         if containers_found_dict["machine"] and not machine_conflict:
             for extruder_stack_file in extruder_stack_files:
-                container_id = self._stripFileToId(extruder_stack_file)
                 serialized = archive.open(extruder_stack_file).read().decode("utf-8")
                 parser = configparser.ConfigParser()
                 parser.read_string(serialized)
@@ -301,7 +300,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                         break
 
         num_visible_settings = 0
-        has_visible_settings_string = False
         try:
             temp_preferences = Preferences()
             serialized = archive.open("Cura/preferences.cfg").read().decode("utf-8")