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The underlying DSpace database structure changes and data migrations are now AUTOMATED (using FlywayDB). This means that you no longer need to manually run SQL scripts. Instead, the first time you run DSpace, it will auto-update your database structure (as needed) and migrate all your data to be compatible with the installed version of DSpace. This allows you to concentrate your upgrade efforts on customizing your site without having to worry about migrating your data!

For example, if you were running DSpace 1.4, and you wish to upgrade to DSpace 5, you can follow the simplified instructions below. As soon as you point your DSpace 5 installation against the older DSpace 1.4-compatible database, your database tables (and data) will automatically be migrated to be compatible with DSpace 5.

See below for a specific note on troubleshooting "ignored" migrations (a rare circumstance, but known to happen if you upgrade from DSpace 5 to a later version of DSpace).