Both represent same bond. 1982 year is start of the bond. It was issued til 1991. Emissions stopped due dissolution of USSR.
Maybe merge all users as ND (1982-1991) line on one of them and remove second one.
It was demonetized on Jan 1, 1995. Russian federation replaced them with own bonds (N#401620). Source in Russian - https://www.monetnik.ru/obuchenie/bonistika/obligatsii-zaem-1982-sssr/
I'll translate key conditions on bond after only one piece is left in the system.
