INZ COs must see hundreds of ITAs every year on which applicants have made mistakes. Unless they see something really out of the ordinary, making them think there was intent to deceive, they do not make accusations of fraud - the mistakenly claimed points are just deducted.
As you have 150 points and your ITA has already gone in, you should be all right despite the new requirements. See here.
What if I’ve already applied under the Skilled Migrant Category?
If you’ve already applied, the requirements that were in place on the date you made your application will continue to apply to you. You don’t need to meet the new point threshold and the new requirements for English language evidence do not apply to you.
https://www.immigration.govt.nz/abou...anges/nzrp-smc