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Moodle database (For example, your Postgres or MySQL database dump).Moodle uploaded files (For example, server/moodledata).Moodle software (For example, everything in server/htdocs/moodle).There are three areas that should be backed up before any upgrade: We advise that you test the upgrade first on a COPY of your production site, to make sure it works as you expect.Ĭonsider setting the upgrade key for your site. If upgrading from earlier versions, you must upgrade to 3.9 as a first step. You can only upgrade to Moodle 4.2 from Moodle 3.9 or later.See the release notes in the dev docs for both server and client software requirements. 9 Moodle 3.9, 3.10, 3.11, 4.0 and 4.1 upgrading notesīefore upgrading, check that your server meets all requirements for 4.2 in Site administration > Server > Environment.8 New and changed features in Moodle 4.2.7.1 Fatal error: Maximum execution time of 30 seconds exceeded.If you'd like to learn how to make the best use of your iPhone, consider signing up for our free Tip of the Day. If you feel that reverting to the previous iOS version is still the best option for you despite the setbacks mentioned above, follow the instructions below covering how to uninstall an iOS update. Note: All iOS 14 versions and iOS 15.0 have been unsigned by Apple, so you can no longer downgrade your iPhone software to these versions. To quickly check this, go to and select your device and desired software version to see if the iOS is still signed. If the software version is no longer signed, Apple has stopped supporting the iOS version and you cannot downgrade. Make sure the previous software version is still signed by Apple.This is because there is no way to downgrade your watchOS, and this may cause incompatibilities. Apple Watch users might lose some functionality. If you’ve already installed the latest watchOS on an Apple Watch, you may not be able to fully use your wearable after downgrading your iPhone software.While you can still use an earlier backup, you will still be losing some data. This is because a later version backup cannot be used after you downgrade to an earlier software version. You will lose any data from after your latest iOS update.