Add DKISTUserWarning if calling TiledDataset.plot on stale metada…

…ta file

dkist/dataset/tiled_dataset.py

@@ -19,7 +19,7 @@
 
 from dkist.io.file_manager import FileManager, StripedExternalArray
 from dkist.io.loaders import AstropyFITSLoader
-from dkist.utils.exceptions import DKISTDeprecationWarning
+from dkist.utils.exceptions import DKISTDeprecationWarning, DKISTUserWarning
 
 from .dataset import Dataset
 from .utils import dataset_info_str
@@ -212,6 +212,11 @@ def plot(self, slice_index, share_zscale=False, figure=None, swap_tile_limits: L
         if swap_tile_limits not in ["x", "y", "xy", None]:
             raise RuntimeError("swap_tile_limits must be one of ['x', 'y', 'xy', None]")
 
+        if len(self.meta.get("history", {}).get("entries", [])) == 0:
+            warnings.warn("The metadata ASDF file that produced this dataset is out of date and "
+                          "will result in incorrect plots. Please re-download the metadata ASDF file.",
+                          DKISTUserWarning)
+
         if isinstance(slice_index, int):
             slice_index = (slice_index,)
         vmin, vmax = np.inf, 0