Not sure if this is similar to Multiple SQL issues.
Tried adding a client and here is an error I got in my error.log
[Mon Mar 31 17:01:21.961094 2025] [php:error] [pid 29191] [client 190.10.96.4:25264] PHP Fatal error: Uncaught mysqli_sql_exception: Unknown column 'location_extension' in 'field list' in /var/www/tickets.xxxxx.com/post/user/client.php:57\nStack trace:\n#0 /var/www/tickets.xxxxx.com/post/user/client.php(57): mysqli_query()\n#1 /var/www/tickets.xxxxx.com/post.php(49): require_once('...')\n#2 {main}\n thrown in /var/www/tickets.xxxxx.com/post/user/client.php on line 57, referer: https://tickets.xxxxx.com/clients.php?leads=0&archived=0&q=stephen&canned_date=custom&dtf=&dtt=2025-03-31&industry=&referral=
It did create the client