client correlator configuration

We own an ecommerce business and we are nexperiencing errors when transacting on our site using mobile money due to the client correlator(guuid) being generated which is more than 36 characters in length,when we iniate change ,it still rolls back to 36 chararcters. Need assistance in permanently streaming down a guuid client correlator of 36 characters to 30 /less than 30 characters embed within a website .