In Kanban settings, trying to group by a picklist field. It's not displaying as an option to select. The field is displayed on the list view, and it doesn't have a dependency on it. The list view is filtered by record type and a single stage, and I want to display the kanban with this picklist field. I can group by other fields without an issue for this list view. Any idea why the field isn't available for grouping in the kanban, and how to fix that? Thanks!

Btw a lot of Salesforce help is displaying in Norwegian today, making it a little less than helpful for English speakers...