-- Restore migration 022's wider index (which also covered soft-deleted rows).
--
-- Note this can FAIL where the up-migration succeeded: once retries-after-delete have been
-- allowed, two rows may legitimately share a `client_upload_id` (one deleted, one live), and
-- the wider unique index cannot be rebuilt over them. That is inherent to reverting this
-- direction, not a defect in the down-migration. If it fails, the live-only index is still
-- correct and should simply be kept.

DROP INDEX IF EXISTS upload_client_upload_id_key;

CREATE UNIQUE INDEX upload_client_upload_id_key
    ON upload (client_upload_id)
    WHERE client_upload_id IS NOT NULL;