A small query regrading log levels for user action failures & system failures

[a-h-abid]

In my company, whenever an error occurs whether by User or by System, we generally log those with level "Error". User error meaning like we are logging error when input with wrong otp code, some validation issues, product order failed etc. sort of things. And system errors are like DB query failed, connection error, PHP errors etc.

Now it becomes problem when searching on a huge log to find which ones are system error & which ones are user action based error. We for our easiness have add to context "is_system_error": true/false & it does the job.

I just want to know if there is any community approved way or any standard out there what is being followed. Also is it acceptable to use "Warn" level as User action failures.

Thank you.

Note: Same discussion create at Laravel.io