The zones.kind CHECK constraint still only allowed 'forward', 'reverse4' and 'reverse6', so creating an extended zone hit a constraint failure and a 500. Rebuilds the zones table with the widened constraint while preserving row ids so records.zone_id references stay valid. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01V8c76Xr2BycaHHu5N4buqi