Keep MY20 protection enabled and work with whatever options the tool gives you.
Also, since you have a NO-NAV running 3.4, check this guide for guidance → Tutorial: Sync 3.4 NON-NAV APIM: Failure to Update to Newer Version Sync 3.4
Keep MY20 protection enabled and work with whatever options the tool gives you.
Also, since you have a NO-NAV running 3.4, check this guide for guidance → Tutorial: Sync 3.4 NON-NAV APIM: Failure to Update to Newer Version Sync 3.4