re assigning projected geometry

[JYZMT]

Hello,

I was hoping someone could discuss the best methods of re-assigning projected geometry, when it gets lost because changes were needed up stream in a timeline. I just want to make sure I'm not missing a trick here. i.e. when sketch geometry goes yellow because its not there any more, or is there but is from a different source.

It happens from time to time, because you never really know at the start of a design the most robust way to define the projected geometry and sometimes it becomes a serious headache to follow the repercussions down stream.

Say for example I have modeled something with a mitred edge (or a chamfer in fusion language, but generated from a sketch extrusion, not a chamfer feature). The obtuse angle vertex is projected  into another sketch, controlling other geometry later down stream. Then I go back and change the source geometry and remove the mitred edge. The later sketch falls over because the obtuse angle vertex has gone. This line goes yellow. 

Is there an easy way to say, 'hey, keep everything the same, but this is the new projected line to reference, forget about the old one'. Sometimes, simply deleting the yellow and re projecting a new one is a headache, because I then need to set up all the associated geometry again. 

I appreciate this is a tricky operation. I just wanted to check there is not a simple solution I have missed as I learned fusion. 

Thanks

[JYZMT]

I should post my current best method of course...

I go to the error sketch, pick the yellow line and the little project symbol comes up (sometimes). I select this, then hit delete. The line generally turns blue to show its undefined. Then I pull it out the way, hopefully not messing up other associated geometry. I then re project the new geometry, then generally using collinear association, I try and link it to the new geometry.  Works maybe 50% of the time. Otherwise I have to delete the lot and re do it, dealing with any errors downstream. 

Thanks

[TrippyLighting]

You should probably post a design exhibiting the problems. It is much easier to discuss these things on concrete detail that in the abstract.