## v10.2.1 — Bug Fix Release ### Fix: Upgrade failure from duplicate column errors Fixes installation failure when upgrading between versions (e.g., 10.0.1 → 10.2.0) caused by MySQL `ALTER TABLE ADD COLUMN` failing on columns that already exist from a previous partial upgrade attempt. **What happened:** Joomla's schema updater aborts on the first SQL error, leaving the site with updated PHP files but an incomplete database schema. Retrying the upgrade would fail again because some columns were already added. **What's fixed:** New preflight schema check reads the currently installed `install.mysql.utf8.sql` to determine what columns each table should have, compares against the live database, and drops any leftover columns from failed upgrades — restoring the DB to a clean state before Joomla runs migration SQL. ### Upgrade notes - Safe to install over a failed 10.2.0 upgrade — the preflight will clean up automatically - Also fixes database import/restore scenarios where schema doesn't match expectations - No data migration required