Acceptance of a qualified offer by a person at risk, or by a parent, legal guardian, or other person authorized under § 6-833 of this subtitle to respond on behalf of a person discharges and releases all potential liability of the offeror, the offeror’s insured or principal, and any participating co-offeror to the person at risk and to the parent or legal guardian of the person at risk for alleged injury or loss caused by the ingestion of lead by the person at risk in the affected property.