HOTFIX for v2026.05.15.0. R3 added deep_cuts/rediscover/new_for_you/
on_this_day/first_listens producers + registry entries but not their
system_variant values to the playlists_kind_variant_consistent /
playlists_seed_consistent CHECK constraints (0021's whitelist).
insertSystemPlaylist for any new mix → SQLSTATE 23514, and since
BuildSystemPlaylists is one all-or-nothing txn that aborts the
ENTIRE build — For-You/Discover refresh 500s and the daily lazy
build fails too. System playlists are fully broken in prod.
Migration 0028 drops + re-adds both constraints with all five new
seedless variants (mirrors the 0021 drop-and-readd pattern).
CHECK-only — sqlc/dbq unaffected (regen produced no drift).
Bumps to 2026.5.15+7 for the v2026.05.15.1 patch release.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
1e2c486356