uarpie

MIGRATE_DESTRUCTIVE_BLOCKED

What it means. The migration would drop or rewrite existing data and was not applied.

What to do. Make the migration additive (add columns/tables instead of dropping or renaming), or re-run deploy with allow_destructive_migration: true after the owner confirms.

  • HTTP status: 422
  • Retryable after applying the fix: yes

Every failure from the CLI or an MCP tool has this shape:

{
  "ok": false,
  "code": "MIGRATE_DESTRUCTIVE_BLOCKED",
  "message": "The migration would drop or rewrite existing data and was not applied.",
  "fix": "Make the migration additive (add columns/tables instead of dropping or renaming), or re-run deploy with allow_destructive_migration: true after the owner confirms.",
  "file": "<where to edit, when known>",
  "retryable": true,
  "docs": "https://docs.uarpie.app/errors/MIGRATE_DESTRUCTIVE_BLOCKED"
}

Apply fix (edit file when it is given), then run the same command again.