

Urgent advice needed!
My request is very time sensitive as I must get to the airport in less than 48 hours. I have never silicone cast anything before but I bought this kit to cast a gift for my long distance partner I am about to visit.... anyway, when removing the object from this mold a small piece broke off! (See pictures). I need to pour the silicone in asap, every store is now closed aside from 24hr convince shops. Any advice on how to fix this?
I see basically two approaches, repair the mold with something like toothpaste and flour, or cast the silicone and delicately trim it with a knife. Instinct is telling me not to cut into the silicone, but I have no idea what I'm doing.
Edit: Outcome I trimmed the problem areas (there were more) with a razor after casting the silicone. It came out okay, you can definitely see the repairs if you look but I would have had to trim some areas anyway.