제어관리 데이터 저장기능

frontend/components/dataflow/connection/redesigned/RightPanel/VisualMapping/FieldMappingCanvas.tsx

@@ -214,11 +214,13 @@ const FieldMappingCanvas: React.FC<FieldMappingCanvasProps> = ({
   // 매핑 여부 확인
   const isFieldMapped = useCallback(
     (field: ColumnInfo, type: "from" | "to") => {
-      return mappings.some((mapping) =>
-        type === "from"
-          ? mapping.fromField.columnName === field.columnName
-          : mapping.toField.columnName === field.columnName,
-      );
+      return mappings
+        .filter((mapping) => mapping.fromField && mapping.toField) // 유효한 매핑만 확인
+        .some((mapping) =>
+          type === "from"
+            ? mapping.fromField?.columnName === field.columnName
+            : mapping.toField?.columnName === field.columnName,
+        );
     },
     [mappings],
   );