Of course you can glue the ring only to accurately...
if the ring will still be lost, need to be replaced the guide! I have "ancient"
fly rod, thread on a guides worn out & I had to replace all the guides (I take guides from new broken fly rod)
"Leave it as it is. You cannot improve on it. The ages have at work on it, and man can only mar it." Theodore Roosevelt
"Live with your eyes open, you might notice something and you will have the opportunity to share it with the world." Argail