It says "fixed" is not a valid attribute in theme check

It says "fixed" is not a valid attribute in theme check,"presets": [ { "name": "Advert Title", "fixed": { "position": 1 } } ]

Hello, I wanted to know if theres a way to prevent sections from being moved in the Customizer when working with Json templates. Is there a way to make the fixed so that they remain in place? I attached a screenshot below to further clarify my issue....

@LaurenE If you want to change the background-color and font color of the menu drawer, add the following code to the bottom of the component-list-menu.css (you may see component-list-menu.css) file in the Assets folder. If this answer satisfies your ...

Hi @AliBeachPL what is your store's myshopify address. I will request shopify collaborator access to access your theme code and make the appropriate changes.

@LaurenE Your code would be located in assets/base.css  (or assets/base.css.liquid). Whichever one you see in the assets folder, but the pre-fix is base.css. If this answer satisfies your question, please don't forget to Like and Accept as Solution. ...

@LaurenE  for us to know what file you have to inject the code into, please provide a link to your store so we can see the theme. Thanks!

This is the code I used if it helps. filterMedia() { // scroll thumbnail slider to the beggining document.querySelector("#m-slider").scrollTo(0, 0); if ( this.currentVariant.featured_image != null && this.currentVariant.featu...