On schedule! This university does a usually junk poll every two years right before the election.
That said if you adjust with their typical error this is kind of in line for what other polls show, they had Biden+15, he won by 7, and in 2018 they had Walz+16, actually a pretty similar margin to this (Walz 50 Johnson 34.) So that would imply that Walz is at least on track for about the same sized victory as 2018, hardly a bad thing for the DFL.
Even Amy Klobuchar barely broke 60% in 2018. The state is probably just too polarized for that to be a possibility.