diff --git a/src/c3nav/mapdata/models/update.py b/src/c3nav/mapdata/models/update.py
index 877ef51c..49d1a24d 100644
--- a/src/c3nav/mapdata/models/update.py
+++ b/src/c3nav/mapdata/models/update.py
@@ -201,6 +201,8 @@ class MapUpdate(models.Model):
             last_geometry_update = ([None] + [update.geometries_changed for update in new_updates])[-1]
 
             if last_geometry_update is not None:
+                geometry_update_cache_key = MapUpdate.build_cache_key(last_geometry_update.to_tuple)
+
                 from c3nav.mapdata.utils.cache.changes import changed_geometries
                 changed_geometries.reset()
 
@@ -230,7 +232,7 @@ class MapUpdate(models.Model):
                 logger.info('Rebuilding level render data...')
 
                 from c3nav.mapdata.render.renderdata import LevelRenderData
-                LevelRenderData.rebuild(update_cache_key)
+                LevelRenderData.rebuild(geometry_update_cache_key)
 
                 transaction.on_commit(
                     lambda: cache.set('mapdata:last_processed_geometries_update', last_geometry_update.to_tuple, None)
diff --git a/src/c3nav/mapdata/render/renderdata.py b/src/c3nav/mapdata/render/renderdata.py
index 5bccaa73..a8d5e521 100644
--- a/src/c3nav/mapdata/render/renderdata.py
+++ b/src/c3nav/mapdata/render/renderdata.py
@@ -55,7 +55,7 @@ class LevelRenderData:
     darken_area: MultiPolygon | None = None
 
     @staticmethod
-    def rebuild(update_cache_key, geometry_update_cache_key):
+    def rebuild(update_cache_key):
         # Levels are automatically sorted by base_altitude, ascending
         levels = tuple(Level.objects.prefetch_related('altitudeareas', 'buildings', 'doors', 'spaces',
                                                       'spaces__holes', 'spaces__areas', 'spaces__columns',
@@ -352,9 +352,9 @@ class LevelRenderData:
 
                 package.add_level(render_level.pk, theme, map_history, access_restriction_affected)
 
-                render_data.save(geometry_update_cache_key, render_level.pk, theme)
+                render_data.save(update_cache_key, render_level.pk, theme)
 
-        package.save_all(geometry_update_cache_key)
+        package.save_all(update_cache_key)
 
     cached = LocalContext()