Your news is fake news.
There is no such thing. Every will is a net new document which nullifies any previous will. That is reinforced in the leading clause of every will, the example of which I included. You should read it.
All bequests and promises must be explicitly specified. There is no "already written rather than excludes". That is a recipe for intestacy.
You also mentioned the Ten Commandments. They are eclipsed and transcended in and by the New Testament here:
Matthew 22
36 Master, which is the great commandment in the law?
37 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind.
38 This is the first and great commandment.
39 And the second is like unto it, Thou shalt love thy neighbour as thyself.
40 On these two commandments hang
all the law and the prophets.