Custom Entity Crashes Server

I am trying to make a custom cow hit players after they attack the cow, however it crashes the server every time the cow attacks the player because the cow doesn't have the attribute DAMAGE. How do i give the cow in the most recent version 1.17.1 of Bukkit an attack attribute?

Code:

public class CustomSeaCow extends EntityCow{
    public CustomSeaCow(Location loc) {
        super(EntityTypes.n, ((CraftWorld) loc.getWorld()).getHandle());
        this.setPosition(loc.getX(), loc.getY(), loc.getZ());
        this.setCustomName(new ChatComponentText(org.bukkit.ChatColor.DARK_GREEN + "Sea Cow"));
        this.setCustomNameVisible(true);
        this.getAttributeMap().a(GenericAttributes.e);
        this.getAttributeInstance(GenericAttributes.e).setValue(300.0D);
    }
    @Override
    public void initPathfinder() {
        this.bQ.a(0, new PathfinderGoalHurtByTarget(this));
       
       
        this.bP.a(1, new PathfinderGoalMeleeAttack(this, 1.0d, true));
        this.bP.a(2, new PathfinderGoalMoveTowardsTarget(this, 1, 1));
        this.bP.a(3, new PathfinderGoalRandomLookaround(this));
        this.bP.a(4, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 8.0F));
       
    }
}

 

bump

 

last bump, hope someone can figure this out