diff --git a/src/components/EditPanel.tsx b/src/components/EditPanel.tsx
index ca5265d..396ab36 100644
--- a/src/components/EditPanel.tsx
+++ b/src/components/EditPanel.tsx
@@ -111,14 +111,14 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
     shortEn: row[COLUMNS.SHORT_EN] || '',
     detailsDe: row[COLUMNS.DETAILS_DE] || '',
     detailsEn: row[COLUMNS.DETAILS_EN] || '',
-    innerW: row[COLUMNS.INNER_W] || '',
-    innerL: row[COLUMNS.INNER_L] || '',
-    innerH: row[COLUMNS.INNER_H] || '',
-    outerW: row[COLUMNS.OUTER_W] || '',
-    outerL: row[COLUMNS.OUTER_L] || '',
-    outerH: row[COLUMNS.OUTER_H] || '',
-    unitsOuter: row[COLUMNS.UNITS_OUTER] || '',
-    moq: row[COLUMNS.MOQ] || '',
+    innerW: row[COLUMNS.INNER_W] !== undefined && row[COLUMNS.INNER_W] !== null ? String(row[COLUMNS.INNER_W]) : '',
+    innerL: row[COLUMNS.INNER_L] !== undefined && row[COLUMNS.INNER_L] !== null ? String(row[COLUMNS.INNER_L]) : '',
+    innerH: row[COLUMNS.INNER_H] !== undefined && row[COLUMNS.INNER_H] !== null ? String(row[COLUMNS.INNER_H]) : '',
+    outerW: row[COLUMNS.OUTER_W] !== undefined && row[COLUMNS.OUTER_W] !== null ? String(row[COLUMNS.OUTER_W]) : '',
+    outerL: row[COLUMNS.OUTER_L] !== undefined && row[COLUMNS.OUTER_L] !== null ? String(row[COLUMNS.OUTER_L]) : '',
+    outerH: row[COLUMNS.OUTER_H] !== undefined && row[COLUMNS.OUTER_H] !== null ? String(row[COLUMNS.OUTER_H]) : '',
+    unitsOuter: row[COLUMNS.UNITS_OUTER] !== undefined && row[COLUMNS.UNITS_OUTER] !== null ? String(row[COLUMNS.UNITS_OUTER]) : '',
+    moq: row[COLUMNS.MOQ] !== undefined && row[COLUMNS.MOQ] !== null ? String(row[COLUMNS.MOQ]) : '',
   });
 
   const [loadingField, setLoadingField] = useState<string | null>(null);
@@ -146,7 +146,7 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
     };
     const colIndex = (colMap as Record<string, number>)[field as string];
     if (colIndex === undefined) return false;
-    return formData[field] !== (row[colIndex] || '');
+    return formData[field] !== (row[colIndex] !== undefined && row[colIndex] !== null ? String(row[colIndex]) : '');
   };
 
   const handleGenerate = async (field: keyof typeof formData) => {