How can i change Entity's Max HP with potion effect in 1.19.2?

[NamelessSlime]

    @Override
    public void removeAttributeModifiers(LivingEntity livingEntity, AttributeMap attributeMap, int pAmplifier) {
        super.removeAttributeModifiers(livingEntity, attributeMap, pAmplifier);
        if (livingEntity.isAffectedByPotions()) {
            livingEntity.setHealth(livingEntity.getMaxHealth() - ((float) pAmplifier));
        }
    }

I want to Decrease Max HP of Entity with potion Effect 

This code is acutally work, But what i Expected

This code only decrease current hp not the MaxHp