You should never update your online shop right away. The automatic upgrade tool can fail in some situations, and you might not be able to revert to the previous version.
The safest way is to have an exact copy of your shop available, either on your local computer or in another folder of your web server. It should contain all your products, categories, themes, modules, translations, settings, etc.
Make a trial upgrade on that copy of your shop. Once the upgrade is done, browse your front- and back-office thoroughly to make sure that everything is as expected. If not, then the upgrade tool has an issue with your configuration, and you should use the manual upgrade method, which is now deprecated and takes longer, but safer which may help in your situation.
Downloading and installing the 1-Click Upgrade module