V-core 500 Hybrid y resonances

good morning. I've been trying to solve a problem with the y-axis resonance graphs for a few days now. The graphs in X are perfect, but I'm still having problems in y. I tried to check that there were no vibrations on the gantry and that the belts were sliding correctly. The last correction I made was to tighten the frame nuts to 13N/m. I noticed that it twists and dances a lot during printing. I always thought it was normal given the size of the printer (v core 500 hybrid) but unfortunately even tightening didn't solve much. I'm attaching the graphs.