diff --git a/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx b/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx
index ac5cc8d1..2bfdda74 100644
--- a/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx
+++ b/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx
@@ -715,8 +715,12 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
         const colName = typeof col === "string" ? col : col.name || col.columnName;
         if (colName && colName.includes(".")) {
           const [refTable, refColumn] = colName.split(".");
-          // 소스 컬럼 추론 (item_info → item_code)
-          const inferredSourceColumn = refTable.replace("_info", "_code").replace("_mng", "_id");
+          // 소스 컬럼 추론 (item_info → item_code 또는 warehouse_info → warehouse_id)
+          // 기본: _info → _code, 백업: _info → _id
+          const primarySourceColumn = refTable.replace("_info", "_code").replace("_mng", "_id");
+          const secondarySourceColumn = refTable.replace("_info", "_id").replace("_mng", "_id");
+          // 실제 존재하는 소스 컬럼은 백엔드에서 결정 (프론트엔드는 두 패턴 모두 전달)
+          const inferredSourceColumn = primarySourceColumn;
 
           // 이미 추가된 조인인지 확인 (동일 테이블, 동일 소스컬럼)
           const existingJoin = additionalJoinColumns.find(