Debug invalid password

I’m using Grafana 10.4.2 @ RHEL 8.9

admin user started logging invalid password and has been locked for too many incorrect attempts since May 11 and I cannot see what’s going on. The user has the same password since installation (changed from default admin:admin).

Now I only login with admin user if disable brute force protection
Here is the log:
logger=authn.password t=2024-05-14T14:31:03.973442286-03:00 level=debug msg=“Failed to authenticate password identity” client=grafana error=“[password-auth.invalid] invalid password”

If I try to login with a wrong password from login form, the log shows my remote_addr, so I supposed that error is something internal from Grafana.

Who is trying to use admin user and how can I update the password?