I see the user SYS's LOGOFF record in table sys.aud$.

Hi everyone,

As I said in the title, I see the user SYS's LOGOFF record in table sys.aud$.

Although, it's determined by Oracle that it can NEVER appear in the table.

But I see it sometimes in my db.Please believe me...

It's my trouble that I haven't be able to detemine the operation(SQL) which creates the records,

because the access made from the other team's db and they say it's impossible to access to my db by DBA user of my db

since they have never known the password.

In my db, SYS's LOGIN is allowed by only OS certification,and the OS user's password is changed regularly by term by another security team,