I've not long returned to Destiny 2 after a long break. During the first mission of The Final Shape I changed a perk on my shotgun - The Comedian (Adept) - from one thing to another, but when I then try and reverse that change it doesn't let me. It flashes red, like I am trying to select something that isn't selectable. When I attempt to change the perk via the D2 companion app I get the error message "You cannot afford the material requirements for that action", this is despite the fact I had the perk equipped only a moment ago. I've waited 3 days now and to this point I still can't select the perk in question (Bottomless Grief, in case specifying that helps). Has anyone had any similar issues to me with this one?