Need help! I want to update my item but..

Hi, I am a new author here. I want to update one of my items because I think the design was very simple. I uploaded the update but got soft rejection because of this reason “The majority of the item has changed so much that it should really be submitted as a new item instead of an update.”
And then I uploaded the update as a new item but this item got hard rejection, yeah maybe because it has a lot similarities with the item before it.
So what should i do? Do I have to change the update and make it less difference with the item? Or should I delete the first item and upload the new update instead?

This is the item I wanted to update

and this is the update

Big thanks for your helps!