Although I’m dubious about “If any Musician’s Respect or Grievance changes in a way that violates one of these constraints, they cease to have a Grievance.”

That’s there because otherwise it would be illegal for the Musician you Respect to change their Respect to your Grievance.

Does that mean “If a Musician respects another Musician, they cannot have a Grievance… Well, they can, but if they do, they lose their Grievance.”?
If it doesn’t, then I don’t understand it. If it does, I don’t think it works.

Suppose:
A Respects B and holds Grief against C.
B Respects X and holds Grief against Y.
B changes their Respect to C, which violates one of the constraints, and so B ceases to have a Grievance against Y, and we end up with:
A Respects B and holds Grief against C.
B Respects C and has no Grievance.
Which is still illegal.

I think Cpt_Koen is right in his interpretation.

pass and fix

Broken per Cpt_Koen