Hello, i tried to change the user's Application accesses from "Access rights" to "Settings", but it shows error when save.

The error looks like below:

Odoo Server Error - Access Error

Sorry, you are not allowed to modify this document. Only users with the following access level are currently allowed to do that:
- Administration/Access Rights

(Document model: res.users)

I guess the problem is due to I have changed it from "Settings" to "Access Right" before this. So the user Mitchell Admin no longer has the Admin right to do so.

Can anyone helps?