I have WP 6.3 on the server I want to stop using and installed 6.31 on a server I want to start using (6.3 is not available from this host, using Simple Scripts). After exporting the blog, I tried to import it and got this msg when it reached post 73:
73. Importing post “Intimacies” Group switcheroos...
WordPress database error: [Duplicate entry '' for key 2]
INSERT INTO wp_terms (name, slug, term_group) VALUES ('', '', '0')
Fatal error: Cannot use object of type WP_Error as array in /home/netingen/public_html/trueintimacies/wp-includes/taxonomy.php on line 1010