I've created a custom product type ("products_extra") with its own database table with extra fields but I'm getting a weird error in my logs whenever I try to insert or update one of these products.

I'm not sure where to look in the code to fix it. Does anyone know what the error below means?

PHP Fatal error: 1054:Unknown column 'products_extra' in 'field list' :: insert into products_extra (products_extra, products_id) values ('', '1') in [...]query_factory.php on line 101

Your help is really appreciated. Thank you.