I need to change the staked address as that one is compromised during the April hack that I mentioned above.
you should definitely confirm ownership of the account by signing a message on one of your oldest addresses used here on the forum. I guess not all of them is compromised and only you have access to them.
Your oldest (used 11 April 2013)
1C5voy2et9odzmocDxirb4S6GrTJ6MeqsW here Or
3JHJKATezUpeGs9JeobzY7U2Fo6iybZ6yL which you used (in 2018) to apply in signature campaigns.
here,
here,
here I already have a strong password. Always did.
the reason is that it must be determined that you are the original owner of the account. But obviously is not enough strong.