I am guessing the green line is the rotation. Check the value of the handle on the right is the same as the key value. I’m guessing it is different. You can use the f-curve menu on right side of graph editor.
You want to change the value, the key frame 108 has a. value 8.712, but. the right handle has a value of 8.708, so that is why it keeps moving, set it to 8.712 same as the key value. Good luck.