Dom in Kenya

I own a Benelli M4 Super 90. On a routine change of ammunition from slugs to buckshot with no gun firing involved I was manually ejecting the slugs when the last round got stuck. I can’t pull back the bolt which is stuck and won’t budge. With a live round in the chamber what are my options to clear this issue? Can I disassemble the weapon with a live round in the chamber? Appreciate your feedback.