And since some think it, or think about it sometimes, or sometimes think about it quite a bit sometimes, I'm going to talk about it a little bit at this time.
God in the OT was God the Holy Spirit, and He didn't always know everything, or was not fully omniscient, but only the Highest One, the One whom Jesus referred to as his and our Father most of the time, was the only One who only always is/ever always was, ever always that High, or was the only One who was/always has been 100% fully omniscient.
But God in the OT was responsible for specially creating/making Adam and Eve, and the Garden of Eden, and they were a specially created species/race of humans who did not have to go through the process of natural evolution, and He did this around 6000 years ago or so, in some smaller area/region in the region of Mesopotamia somewhere, etc. They were meant to eventually spread their influence/garden and rule over all other humans of the earth as a ruling class that would be or stay 100% pure, and that would create perfection/paradise for all other species/races in and with just a little bit of time, or with given just a little bit of time, etc. Obviously, things didn't go as planned, and God in the OT/God the Holy Spirit had to try to do his best to change/modify/update His plans after Adam and Eve's disobedience many, many, many times, etc.
This backstory is to explain what He was trying to do in the OT. He wanted a perfect Kingdom with a ruling class that would rule over/lead all others at the time. And that would be sin free, and that would make the whole earth into a perfect, sin-free, forever and ever, everlasting Kingdom or paradise, etc. And this is what He was trying to restore or bring us back to in the OT, which is why all the strict rules/punishments of death a lot of the time in the OT, and attempted entire elimination of some other species/races in the OT sometimes. He knew of the plan of Jesus Christ from the beginning always, but wasn't wanting to have to enact it, etc, a command/word for Him that came from the Father, shown in how He tried or tested Abraham with Abraham's son Issac, etc, but was not wanting to have to do it, or even expecting to ever have to do it, until He had done or had tired everything else first at the time.
It's still the plan now, but it falls to Jesus Christ to enact it or cause or make it happen now when he returns, and we seem to have confirmation that Jesus Christ's efforts were already 100% successful 2000 years ago, but are not meant to be fully enacted or carried out or, fulfilled until a future time and date sometime, etc.
God Bless