Hi @xav,
Thanks for the post.
As a workaround, I would suggest you switch to a Repeater field.
Here you will only need to create a Repeater and a sub field called “Most Popular”. You can then limit this sub field to one row. Afterwards you can then nest another repeater field containing the rest of the sub fields.
For more info on nesting Repeaters, you can look at this resource: https://www.advancedcustomfields.com/resources/working-with-nested-repeaters/
