Puzzles

SVSim.EmulatedEntrypoint/Controllers/DeckController.cs

@@ -181,6 +181,9 @@ public class DeckController : SVSimController
                 if (skin is not null) deck.LeaderSkin = skin;
                 deck.RandomLeaderSkin = request.IsRandomLeaderSkin;
                 deck.Cards = cards;
+                // Clear stale rotation_id if the deck moved to a non-MyRotation format;
+                // otherwise persist the chosen period so it survives the next /load/index.
+                deck.MyRotationId = format == Format.MyRotation ? request.RotationId : null;
             });
         }