Process WAD_USRINFOHIST High memory usage

Hi,

I have a problem on my FortiGate61F, I have a process called "wad_usrinfohist" and it's using 40% of memory on its own.

So my fortinet goes to 80% memory usage and goes into conservation mode.

When I restart the fortinet, the process goes down again and my fortinet goes back to 40% of total memory usage, but the process goes back up again and brings my fortinet back to 80% after a few days.

Do you have any solution to restrict the % of this process?

Thanks.