This is the SQL injection WAF rule by the sound of it.
Is this on one of your site's in which you have access to the Cloudflare dashboard? If so the firewall events can be viewed on the traffic tab and it will give the reason.
I've disabled that WAF rule on here, which is safe to do it you know your web application isn't vulnerable to SQL injection.
On LFGSS?
This is the SQL injection WAF rule by the sound of it.
Is this on one of your site's in which you have access to the Cloudflare dashboard? If so the firewall events can be viewed on the traffic tab and it will give the reason.
I've disabled that WAF rule on here, which is safe to do it you know your web application isn't vulnerable to SQL injection.