diff --git a/bemani/backend/popn/fantasia.py b/bemani/backend/popn/fantasia.py
index 1a1fb34..6113dd2 100644
--- a/bemani/backend/popn/fantasia.py
+++ b/bemani/backend/popn/fantasia.py
@@ -479,7 +479,12 @@ class PopnMusicFantasia(PopnMusicBase):
                     self.GAME_CHART_TYPE_NORMAL: self.CHART_TYPE_NORMAL,
                     self.GAME_CHART_TYPE_HYPER: self.CHART_TYPE_HYPER,
                     self.GAME_CHART_TYPE_EX: self.CHART_TYPE_EX,
-                }[node.child_value("sheet")]
+                }.get(node.child_value("sheet"))
+                if chart is None:
+                    # Some old versions of Fantasia still send empty chart data for Tune Street
+                    # charts that don't exist in the game. Ignore these or we end up crashing on
+                    # profile save.
+                    continue
                 medal = (node.child_value("n_data") >> (chart * 4)) & 0x000F
                 medal = {
                     self.GAME_PLAY_MEDAL_CIRCLE_FAILED: self.PLAY_MEDAL_CIRCLE_FAILED,
diff --git a/bemani/format/afp/container.py b/bemani/format/afp/container.py
index d61e538..3cf32c6 100644
--- a/bemani/format/afp/container.py
+++ b/bemani/format/afp/container.py
@@ -1134,7 +1134,9 @@ class TXP2File(TrackedCoverage, VerboseOutput):
 
         if feature_mask & 0xFFF00000:
             # We don't know these bits at all!
-            raise Exception(f"Invalid bits set in feature mask {hex(feature_mask & 0xFFF80000)}!")
+            raise Exception(
+                f"Invalid bits set in feature mask {hex(feature_mask & 0xFFF80000)}!"
+            )
 
         if header_offset != header_length:
             raise Exception("Failed to parse bitfield of header correctly!")