When I was using 1 Shot lube, I learned very quickly to always have a puller on hand. And many dies will not allow you to remove the decapper assembly from the top, so all you can do is back it off as far as possible to prevent damage while drilling/tapping/pulling. I now keep a spare decapper assembly as well. Glad you got that one out, and if you're using 1 Shot be dam sure to let it dry before sizing-or do like I did and use something else....
ETA: I see after looking at it again that it is a Lee die. If that decapper has a replaceable decapping pin, you can probably rescue the one in the pic by just grinding the mushroom head off the end.