This isn't a huge issue, but I can't for the life of me figure out what I've done.

I have a table set up with all my data by day. I have a line chart that tracks this and since it's from the table, the chart updates when I update the table. When the chart updates, it also adds a data label for the new dates added. I don't want it to add these new data labels. I just want the line and if I want a data label I'll add it myself. I do have some dates with labels on previous dates like this. I have another chart from the same table that doesn't automatically add data labels for new data. I'm not sure what the difference between the two charts is. Any ideas on how to turn off automatically adding data labels?