Cloning quest mode tokens

I cast clone, copying the quest mode hound token (fully upgraded). I got the error message when the computer blocked the clone.
java.lang.RuntimeException: CardFactory : getCard() invalid card name - Hound Pet
at forge.card.cardFactory.CardFactory.getCard2(CardFactory.java:369)
at forge.card.cardFactory.CardFactory.getCard(CardFactory.java:346)
at forge.card.cardFactory.CardFactory.copyCard(CardFactory.java:185)
at forge.GameAction.moveTo(GameAction.java:74)
at forge.GameAction.moveToGraveyard(GameAction.java:197)
at forge.GameAction.sacrificeDestroy(GameAction.java:2066)
at forge.GameAction.destroy(GameAction.java:2146)
at forge.GameAction.checkStateEffects(GameAction.java:506)
at forge.Phase.handleBeginPhase(Phase.java:261)
at forge.gui.input.InputControl.updateInput(InputControl.java:97)
at forge.GuiInput.update(GuiInput.java:21)
at java.util.Observable.notifyObservers(Unknown Source)
at java.util.Observable.notifyObservers(Unknown Source)
at forge.MyObservable.updateObservers(MyObservable.java:9)
at forge.Phase.nextPhase(Phase.java:375)
at forge.Phase.nextPhase(Phase.java:378)
at forge.GuiDisplay4$25.actionPerformed(GuiDisplay4.java:746)
...
java.lang.RuntimeException: CardFactory : getCard() invalid card name - Hound Pet
at forge.card.cardFactory.CardFactory.getCard2(CardFactory.java:369)
at forge.card.cardFactory.CardFactory.getCard(CardFactory.java:346)
at forge.card.cardFactory.CardFactory.copyCard(CardFactory.java:185)
at forge.GameAction.moveTo(GameAction.java:74)
at forge.GameAction.moveToGraveyard(GameAction.java:197)
at forge.GameAction.sacrificeDestroy(GameAction.java:2066)
at forge.GameAction.destroy(GameAction.java:2146)
at forge.GameAction.checkStateEffects(GameAction.java:506)
at forge.Phase.handleBeginPhase(Phase.java:261)
at forge.gui.input.InputControl.updateInput(InputControl.java:97)
at forge.GuiInput.update(GuiInput.java:21)
at java.util.Observable.notifyObservers(Unknown Source)
at java.util.Observable.notifyObservers(Unknown Source)
at forge.MyObservable.updateObservers(MyObservable.java:9)
at forge.Phase.nextPhase(Phase.java:375)
at forge.Phase.nextPhase(Phase.java:378)
at forge.GuiDisplay4$25.actionPerformed(GuiDisplay4.java:746)
...