Go the plugin manager
click on "add new plugin"
then you get to
- create a dummy user so that you can test the workaround. You need to see what you are fixing before you fix it.
- choose the product - for the sake of linking I selected the url product that the other plugin is added to
- choose the hook - scroll through until you find "editpost_update_process"
- add the code above
- mark as active
- save
- test