Water Supply Hose is Leaking

My GE TPX24SRY refrigerator has the water supply (plastic 5/8 hose) that is leaking and needs to be replaced. This hose goes from the back of the unit to the coupling under the freezer door, for the water dispenser. I had tried to remove it, but afraid to do more damage. It looks like it is connected to something in between… Do you know how replace this water supply line?