In Moodle enter your old 1.1 tool and modify the version to 1.3.
Copy all required details from the existing 1.3 tool you already have into this tool.
Click save and test your old 1.1 links, make sure they are still working,
If they do not:
- Go back into the tool and switch back the version to 1.1
- Click save.
- Check old links again, they should be working.
- Please contact Exlibris support.
If links are working you can now delete the other 1.3 tool in your LMS if you want