Why won't this cylinder subtract from bracket?

[Marty01]

I have designed a bracket for a front light for my bike, but need to have a split for the light to fit in so a bolt can secure it but I have everything in place but cant seem to subtract the cylinder which represents the gap for the light.
front-light-bracket.skp (1.2 MB)

[3DxJFD]

There’s a stray edge. Remove it and it should be solid.

[Royce]

front-light with hole.skp (1.2 MB)
The Trim tool worked in SU Go. When I inspected your groups, one of them had a stray edge. I let inspector correct that before I used the Trim tool.

[Marty01]

front-light-bracket.skp (1.2 MB)

Thanks @Royce managed to complete :