Laravel Nova MorphOne issue

Hi Guys! First post. I'm using a Nova Admin panel and using Image resource for User to upload image. So when I use

MorphOne::make('image'),

I get "The HasOne relationship has already filled." error but when I use

MorphMany::make('image'),

it creates image but allows multiple image upload. I want only one.

I am new to Nova and I don't know what I'm missing. Thank you.