The recessed center column nut is not the problem - it's the spring, so best way to fix it is adding a bypass. If the spring is too deformed, I'd look at replacing it as well, but not sure if I have anything quality in that size and same stiffness - might, but not sure. If a got a "Blue" spring that fits, definitely would use it -- we know these springs well (https://budgetlightforum.com/t/-/51885, https://budgetlightforum.com/t/-/54402, https://budgetlightforum.com/t/-/56987). I think I have a supply of every size he has sold.
It's interesting though the WT90 stock driver springs looks very similar to the silver coated BeCu springs Blue sells.
For reference, djozz's spring tests: https://budgetlightforum.com/t/-/29825