ALTER TABLE IF EXISTS projections.quotas ALTER COLUMN from_anchor DROP NOT NULL;
ALTER TABLE IF EXISTS projections.quotas ALTER COLUMN amount DROP NOT NULL;
ALTER TABLE IF EXISTS projections.quotas ALTER COLUMN interval DROP NOT NULL;
ALTER TABLE IF EXISTS projections.quotas ALTER COLUMN limit_usage DROP NOT NULL;
ALTER TABLE IF EXISTS projections.quotas ALTER PRIMARY KEY USING COLUMNS ( instance_id, unit, id );