Portmanteaus

Is there a way to remove a portmanteau?? It can be frustrating to have some in inventory when trying to do the current events.

Not that I’ve found. I make sure not to pick up regular portmanteaus for a few days before events start since I don’t get many keys in the game

I opened a portmanteaus and then replaced it, but I am not getting credit for what I am doing in the challenge. Is there a secret?