Not even collapse stops creditors from trying to collect on their debts.
After the collapse of the Soviet Union, the newly formed Russian Federation had to not only come up with a new financial strategy for its future, but also had to consider repaying the billions of dollars the Soviet Union borrowed from abroad. In 1996, Paris and Moscow signed an accord to write off the tsarist debt. Russia paid but not nearly as generously as the descendants of French bond buyers hoped.
Not even collapse stops creditors from trying to collect on their debts.
https://en.wikipedia.org/wiki/Repudiation_of_debt_at_the_Russian_Revolution