Since version 3.9, manual schemas are saved differently in your database to speed up things. This hook is only useful in case you need to display the old values in your WordPress site before cleaning the database using our dedicated button from the notice.
Since version 4.2, we have added unlimited manual schemas per post with a multi-dimensional array to save the data. We have a hook to fallback if necessary.
Hook name: seopress_get_pro_schemas_manual / seopress_pro_rich_snippets_data_is_multidimensional
Required version: 3.9 / 4.2