Need help: plan wants to recreate things already in state

I’m trying to update some rather old TF states and have run into something I don’t know how to resolve.
There was something created ages ago, likely with v0.11.7, and a plan says:
Terraform 0.11.7 does not support state version 4, please update.

I switch to 0.11.14 and the plan does run, but it says it will create some things. I do a state list and I see those things exist in state. I’ve used state mv, state rm, and such previously to great success but I’m not sure how to move forward on this.

Any tips are appreciated.