How to modify the log file format thats missing the number in brackets at the front

Hi, In my version2 freeradius server I had radius.log output of the format (192239) Sun Mar 26 00:01:58 2023 : Auth: Login incorrect (No Auth-Type found: rejecting the user via Post-Auth-Type = Reject): With my version 3 server I have the following format Sun Mar 26 00:01:58 2023 : Auth: Login incorrect (No Auth-Type found: rejecting the user via Post-Auth-Type = Reject): Its the same but the number in brackets has been removed Is there a way of reintroducing the number in brackets into my version 3 radius.log file? What does this number mean? We have some legacy software that uses the number you see Regards Geoffrey