Turn off "Session rotated successfully." logging

There is probably a more important question besides. I think you should instead assess whether you are implementing SessionRotate correctly.

The function SessionRotate invalidates the current session and creates a new session. migrating session data from the old session to the new. This implies that its use would be required only sparingly.

The fact that "Session rotated sucessfully" fills up the logs suggests to me that the function SessionRotate may be called too often. I would therefore suggest that you first investigate whether that is so.