If the parentOWNS THE SUBSIDIARY, then the PARENTOWNS THE DEBT.
It has been juggled about internally, . but (i) it has not gone away, and (i) it flows up to the par- ent as a debt responsibility.
THE SUBSIDIARY CANNOT DECLARE BANK- RUPTCY ( now ) and have the debt disappear. . In that case ( bankruptcy of the subsidiary ) the parent will get the bill. "Inherit" the bill, so to speak.