id summary reporter owner description type status priority milestone component version severity resolution keywords cc focuses 49796 wpmu_new_blog is deprecated since version 5.1.0 warning oldrup "Hey. Whenever I'm creating new sites on my multisite installation, I get the following warnings (since I activated debugging due to another issue). It seems that WordPress uses a deprecated function when new sites are created. The site is created just fine, its just warnings. Deprecated: wpmu_new_blog is deprecated since version 5.1.0! Use wp_insert_site instead. in /home/oldrupdk/labs.oldrup.net/wp-includes/functions.php on line 5088 Warning: Cannot modify header information - headers already sent by (output started at /home/oldrupdk/labs.oldrup.net/wp-includes/functions.php:5088) in /home/oldrupdk/labs.oldrup.net/wp-includes/pluggable.php on line 1281 Warning: Cannot modify header information - headers already sent by (output started at /home/oldrupdk/labs.oldrup.net/wp-includes/functions.php:5088) in /home/oldrupdk/labs.oldrup.net/wp-includes/pluggable.php on line 1284" defect (bug) closed normal Networks and Sites 5.4 minor invalid