Showing a CMS collection if a blog post's specific field is empty

Design help CMS
1

Hello,

I have a CMS collection for posts. Each post have a multi-reference field to pick other posts for the Read More section.

Below each post there are two collection lists (Read More section):

  1. If the multi-reference field in the blog post is set (is not empty), then show that collection list.
  2. If the multi-reference field is empty, then show the second collection list. I set a filter to show the other (second) Collection List only when the Multi-Reference field for the post is not set, but that’s not working.

Any help would be appreciated.

Here is my public share link: LINK
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