Automatically add all devices to the Admin

I have a question about simplifying the administrator's work.
If another user added a device himself, is it possible to link all added devices to the Admin with one SQL command:

INSERT INTO tc_user_user (userid, manageduserid)
SELECT 1, u.id
FROM tc_users u
WHERE u.id != 1
  AND u.id NOT IN (
    SELECT manageduserid
    FROM tc_user_user
    WHERE userid = 1
  );

By making changes only to the table "tc_user_user", or can this break something?

(Taking this opportunity, Anton, thank you for the great work you have done.)

This doesn't link any devices. It just links users.

Oh my mistake i meant three similar requests. Thanks for the answer!

INSERT INTO tc_user_device (userid, deviceid)
SELECT 1, u.id
FROM tc_users u
WHERE u.id != 1
  AND u.id NOT IN (
    SELECT deviceid
    FROM tc_user_device
    WHERE userid = 1
  );

INSERT INTO tc_user_user (userid, manageduserid)
SELECT 1, u.id
FROM tc_users u
WHERE u.id != 1
  AND u.id NOT IN (
    SELECT manageduserid
    FROM tc_user_user
    WHERE userid = 1
  );

INSERT INTO tc_user_group (userid, groupid)
SELECT 1, u.id
FROM tc_users u
WHERE u.id != 1
  AND u.id NOT IN (
    SELECT groupid
    FROM tc_user_group
    WHERE userid = 1
  );

Link users and groups so that there is no error when opening the list of devices in the control panel.
These three requests will be enough, right?

Yeah, but seems overcomplicated. You can just select all devices and add a record for each one.