I got a stent install in biliary canal after gallbladder removal , i want to be asleep for my ercp to remove it but it can take up 60 days..dangerous?

Straightforward: Don't worry. While any procedure can have complications, this one is low risk (not zero...). I would be more worried about the reason the stent is there, and whether or not a stricture (narrowing from scar) will develop afterwards. You may want to ask that. I'm sure they will give you adequate sedation for the procedure. Hope this helps!