I have problems with my angular version and Node Version

Recently I downgrade my Angular version from v16 to v8 but when I try to make a Ng serve -o the console claims I need to have node v18 instead of another, but when I set the version to v18 the console throw an error saying is Unssoported, I'm using nvm, I tried uninstall angular and change between node versions. but I've got no results

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