The spline probably has a few burrs where the ring was and will not engage the outer spline.
Use a square end Precision file and gently file the burr down
Harbor Freight has them for 4 bucks.
But do not force it, wiggle/tap and see if you can get those burrs back down.
If you don't have the files, we need HR Jerry to give advice.

Hope this helps and let us know the outcome.
Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!