diff --git a/src/FillSpace.jsx b/src/FillSpace.jsx
index 68d4bbb..270441e 100644
--- a/src/FillSpace.jsx
+++ b/src/FillSpace.jsx
@@ -601,7 +601,7 @@ class FillSpace extends Component {
           >
             <List ref={listRef} dense disablePadding sx={{ width: '100%' }}>
               {pageItems.map((item, i) => (
-                <Box key={item?.id ?? offset + i} data-fill-row sx={{ width: '100%' }}>
+                <Box key={item?.id ?? item?.sku ?? offset + i} data-fill-row sx={{ width: '100%' }}>
                   {renderRowElement(renderItem, item, offset + i)}
                 </Box>
               ))}