Topic on Project:Support desk

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Hello, community!

I'm currently using MediaWiki version 1.27.1 and looking to upgrade to the latest version available. Could someone guide me through the steps involved in this process? Here are a few specific questions I have:

Upgrade Steps: What are the recommended steps to upgrade from MediaWiki 1.27.1 to the latest stable version? I've tried the upgrade but it looks like there's been some MAJOR schema changes and it errors out asking for missing tables. Ive also tried going to the v1.28.0 but its giving me same error. Table 'user' not found. Are there any particular considerations or prerequisites I should be aware of? My next idea is to setup 1.42.1 with the default db and try and see if a schema compare will let me allow a data migration. but again
Database Migration: Currently, my MediaWiki instance is using SQL Server and I've setup a MariaDB using the sql workbench migration feature. Few warnings about the Auto Increment being dropped but nothing major. I'm particularly worried about the schema changes between the two versions

Any help or guidance on these topics would be greatly appreciated! Thank you in advance.