I can only guess without having a complete picture of how the workbook has been set up, but what does it show you when you try to view the underlying data for those 574 records with the * year?
You didn't show us the Marks Card or Pages Shelf, which are necessary to have a better sense of what is going on. I can see from the pills (based on the orange checkmark icons) that they are coming from a blended secondary data source, so the * for the Ship Date dimension is showing up because there are multiple Years for whatever primary dimension(s) are in the view on the Marks Card or Pages Shelf.
An important thing to know about data blending is that your dimensions from the primary determine the overall level of detail for the view. Dimensions from secondary sources will not increase the level of detail.