diff --git a/internal/handlers/media.go b/internal/handlers/media.go
index b6c748d..90de33f 100644
--- a/internal/handlers/media.go
+++ b/internal/handlers/media.go
@@ -439,6 +439,12 @@ func (h *MediaHandler) HandleBulkUpdate(c echo.Context) error {
 		return c.JSON(http.StatusBadRequest, map[string]string{"error": "media_item_updates required"})
 	}
 
+	for _, update := range req.MediaItemUpdates {
+		if update.MediaItemID == "" {
+			return c.JSON(http.StatusBadRequest, map[string]string{"error": "media_item_id cannot be empty"})
+		}
+	}
+
 	results := make([]map[string]interface{}, 0)
 	successCount := 0
 	failedCount := 0