Teiid strives to maintain consistency between all versions, but when necessary breaking configuration and VDB/sql changes are made - and then typically only for major releases.

You should consult the release notes for compatibility and configuration changes from each minor version that you are upgrading over. This guide expands upon the release notes included in the kit to cover changes since 13.x.

If possible you should make your migration to Teiid 14 by first using Teiid 13.1.x. Teiid 14 requires Java 8 and WildFly 19.1. See also 12 to 13 Migration Guide