In the International court of justice decision on the claim of Ukraine against Russia will apply to breaches of the two conventions, but will not affect the most important question of the armed aggression. Why not consider the ultimate question? In your opinion.
Both claims are useless and I believe both countries will not follow the rules. But even if they will not comply to such rules and will both violate or breach the agreement in the convention they will not declare war. These countries are just funny and are like small children but they have good leaders such as placing their complains on a court without resorting to conflict.