Hello,
Now I see the point, you have create an association via the "Display limited to" option to another custom field that just display a text.
The "display limited to" expecting that the custom field have been setted or valided by user, or in your specific case there is nothing to set (for a custom text type)
From this 2 cases and 2 solutions :
=> You only want to associated display if the first is displayed, then "display limited to" isn't the good option, it will be better to use Categories restriction (so maybe you have to remove "product category" and only keep "advice"
=> You want a check, like be sure that your customer have read and valid your text, then maybe you have to set your first custom field as a type text, and not a customtext.
Hope this is more clear, and will help you to move forward on your subject.
Regards