Legal Question in Wills and Trusts in Georgia

Nothing in your post gives us the facts needed to answer.

A new will revokes an older will. However, if the person lacked testamentary capacity to make a will, the new will may not be valid. A person could have capacity to write a will even with dementia, depending on the severity.

Since you have omitted all the needed details, such as the exact medical condition as well as how this affects you, there is no way anyone here can answer you.