I don’t think it’s a restatement but one of written perspective. The “Angel of the Lord” speaks to Abraham directly about his plans for Sodom and Gomorrah...why should Sumerian writers(probably writing decades or centuries after the fact) have known about what God said to Abraham directly and similarly why should Abraham have been told of the the coming destruction of the cities of Mesopotamia...which now makes sense of the story as to why Abraham was told to leave UR instead of God making a great nation with Abraham’s descendants right there in good old Mesopotamia. Why make Abraham move?.... because God was going to wreak great destruction in that area. Abraham lived to be 175 years so his life span could have straddled over the major events of that time.
That crater could have been dated a little earlier or later especially if nuclear elements had been involved since dating the site by isotopic means would have been negated by any nuclear fallout or even meteoric means. One is left trying to use weathering factors but that also means you need to fudge and accept a plus or minus factor. If there is truth about linking the Mesopotamian destruction with the cities of the “ticar” plain on the Northeast coast of the Dead Sea at the mouth of the Jordan then the best dating seems to come in at about 1770 bc. Oh and the Minoan civilization was also taken out about that time...hmmmmm! No wonder the Bible speaks of Sodom and Gomorrah being examples to the nations of God’s judgment.
I believe that Abraham was supposed to be in the 1800s BCE and the Sumerians were before 2000 BCE, thus living well before the fact. The Minoan civilization was taken out during the 1600’s BCE by the effects of Thera volcano. I also read an article in an old National Geographic about the search for a large meteor chunk (dinner table size) in southern Saudi Arabia. When it was found it was dated to a post Jesus date, and the Arabs said it came down to destroy a wicked city. Whenever anything goes wrong there are those who will say it is God’s judgement for wickedness. I seem to remember such comments for New Orleans and Katrina.