When I create a field that selects from other WP Posts, I have the option to set the post as a parent of the current post. However, MB Admin Columns will not currently retrieve that meta and display it in a column (it's blank.)
Currently, admin columns will only show the field value if the field value is stored as post meta or in a custom MB table, not if it's stored as the post parent. Hope that makes sense. I'm going to work around the issue in my current utilization, but wanted to make note of it.
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