I want to make chain to move with bolt but when I move bolt to new position and after rebuild bolt again return back to it's previous position. I expect spline to move bolt's new position but it does not move. How to make it happen? Video is attached.

In the tutorial spline moves to bolt's new position.

Time 51.58-52.05

SolidWorks Tutorial #311: Chain door lock ( adjustable chain, sheet metal, screw mate) - YouTube