Comments - Moving from MariaDB 10.2 to 10.11 on Windows OS
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Provided the 10.11 service on Windows Server 2022 is stopped, copying all the files from the stopped 10.2 service on Windows 2012 is a good way to upgrade.
Before copying ensure that the shutdown on 10.2 was clean in the Windows Event Log and didn't end in a crash and ends in "Shutdown complete".
No need to upgrade the old version first.
Run mariadb-upgrade after the 10.11 service is started.