I have created several a bunch of meta box fields for a custom post type, and I'm trying to move these fields to an mu-plugin. I have exported the PHP for these fields from the Meta Box UI and added it to my custom plugin, however when I make changes to the field code (such as changing a field description), I'm not seeing it in the post edit screen for the post type.
Do I need to also remove the field from the Meta Box UI? Or else how do I ensure that the field config comes from the plugin and not the database?