I need to move two meta box fields into a group field within my field group. This is so it is compatible with a third party plugin. If I use the same field ID for the same type of field within that group, will it continue as usual?
No, the data of the subfield after moving into a group field will not display. You have to add the subfield values again to all posts. In the database, for the top field, the field ID is the meta key, for the group field, the meta key is the group ID, not the subfield ID.
Please read more on the documentation https://docs.metabox.io/field-settings/ https://docs.metabox.io/extensions/meta-box-group/
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