Hello and thanks for the reply.
It does look like the url is set in the wp-config.php file for the old WordPress site. I’m guessing I will need to remove the following code from that file and add it to the wp-config.php file for the new WordPress site (replacing wpsiteold with wpsitenew):
define(‘WP_HOME’,’http://www.mysite.com’);
define(‘WP_SITEURL’,’http://www.mysite.com/wpsiteold’);