PlayStation 3 and Vita owners say digital games they've purchased are disappearing from their libraries, making an apparently random selection of games unplayable, Kotaku reports.

These users say decades-old expiration dates are appearing on their games, making them unavailable. One user said when they downloaded the PSOne Classic version of Chrono Cross, they were told the purchase expired Dec. 31, 1969, and were prevented from playing the game on both PS3 and PS Vita.

Although some suspected this was a Sony ploy to force players into buying the Chrono Cross remaster released Thursday, the same problem appears to be affecting other, unrelated games. Players report running into expiration dates set to 1969 across games as disparate as Chrono Trigger, Final Fantasy 6, Final Fantasy Origins, War of the Lions and Rune Factory: Oceans.

Sony has yet to acknowledge the abrupt expirations. Some Vita users have been able to regain access to their games by buying an additional month of PS Plus subscription, forcing the subscription to refresh, but no free and permanent solution has yet been uncovered.