-- Scope organization slugs per owner instead of globally unique
ALTER TABLE organizations ADD COLUMN owner_id UUID REFERENCES users(id);

WITH first_owner AS (
    SELECT DISTINCT ON (org_id) org_id, user_id
    FROM memberships
    WHERE role = 'owner'
    ORDER BY org_id, created_at
)
UPDATE organizations o
SET owner_id = fo.user_id
FROM first_owner fo
WHERE o.id = fo.org_id;

WITH first_member AS (
    SELECT DISTINCT ON (org_id) org_id, user_id
    FROM memberships
    ORDER BY org_id, created_at
)
UPDATE organizations o
SET owner_id = fm.user_id
FROM first_member fm
WHERE o.owner_id IS NULL
  AND o.id = fm.org_id;

ALTER TABLE organizations ALTER COLUMN owner_id SET NOT NULL;
ALTER TABLE organizations DROP CONSTRAINT organizations_slug_key;
CREATE UNIQUE INDEX organizations_owner_slug_key ON organizations(owner_id, slug);