diff --git a/src/DragGrid.vue b/src/DragGrid.vue
index 7ecd69e5af8293550ed978b9636f7117214045ea..3a63ad6e7e2d804e2736cf504748b27676eff593 100644
--- a/src/DragGrid.vue
+++ b/src/DragGrid.vue
@@ -40,7 +40,7 @@
         class="disabledField"
         :x="disabledField.x"
         :y="disabledField.y"
-        :key="disabledField"
+        :key="disabledField.x + '|' + disabledField.y"
       >
         <slot name="disabledField"></slot>
       </GridItem>