can't delete AD user in FW XG

Hi guys,

We can't delete some users from sophos firewall. When we tried do this, this message was presented: " Couldn't delete user. A firewall rule, VPN connection, web policy rule, or SSL/TLS inspection rule exists for this user"

We already delete the user from AD and now can't delete from table users on firewall.

When open the csc.log we found this information:

MESSAGE Mar 15 12:46:48Z [worker:11107]: {"request":{"method":"opcode","name":"delete_user","version":"1.6","type":"json","length":486,"data":{ "currentlyloggedinuserip": "127.0.0.1", "___cmenabled": 0, "___meta": { "sessionType": 4 }, "Entity": "user", "transactionid": "1535581", "APIVersion": "1900.1", "___serverport": 19951, "userIds": [ "example_user@companyname.com.br" ], "___serverprotocol": "HTTP", "mode": 33, "webfilterid": "Allow All", "___cmrequest": 0, "appfilterid": "Allow All", "___username": "admin_central_sa", "Event": "DELETE", "___serverip": "127.0.0.1", "___component": "GUI", "currentlyloggedinuserid": 3 }}}
ERROR Mar 15 12:46:48Z [delete_user:11107]: get_query_status: DB has returned error code: 23503
ERROR Mar 15 12:46:48Z [delete_user:11107]: get_query_status:Query Error: ERROR: update or delete on table "tbluser" violates foreign key constraint "tblfwuser_userid_fkey" on table "tblfwuser"

which function refer the table informed on the log above ?

Is that possible delete those users using sophos firewall gui ?

Thanks all for help us.