For the last few weeks, I have been intermittently getting this warning when updating through the terminal

Code:
WARNING: Failed to parse default value `[????????? ???????;gnome-appearance-properties.desktop,????????? ???????????? ???????????;gnome-default-applications.desktop,?????????? ??????????;system-config-printer.desktop] ' for schema (/schemas/apps/control-center/cc_actions_list)
Any suggestions?