# `PhoenixKit.Migrations.Postgres.V73`
[🔗](https://github.com/BeamLabEU/phoenix_kit/blob/v1.7.87/lib/phoenix_kit/migrations/postgres/v73.ex#L1)

V73: Pre-drop prerequisites for Category B tables.

Prepares Category B tables for the eventual `DROP COLUMN id` (V74) by:

1. **SET NOT NULL** on 7 uuid columns that currently allow NULLs
2. **CREATE UNIQUE INDEX** on 3 tables missing unique indexes on `uuid`
3. **ALTER INDEX RENAME** on 4 indexes to match renamed columns

All operations are idempotent — safe to re-run.

# `down`

# `up`

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*Consult [api-reference.md](api-reference.md) for complete listing*
