#24581 Added unique key on eav_attribute_label table

Author: Kaushik Chavda

app/code/Magento/Eav/etc/db_schema.xml

@@ -481,11 +481,11 @@
                     referenceColumn="attribute_id" onDelete="CASCADE"/>
         <constraint xsi:type="foreign" referenceId="EAV_ATTRIBUTE_LABEL_STORE_ID_STORE_STORE_ID" table="eav_attribute_label"
                     column="store_id" referenceTable="store" referenceColumn="store_id" onDelete="CASCADE"/>
-        <index referenceId="EAV_ATTRIBUTE_LABEL_STORE_ID" indexType="btree">
+        <constraint xsi:type="unique" referenceId="EAV_ATTRIBUTE_LABEL_ATTRIBUTE_ID_STORE_ID_UNIQUE">
             <column name="store_id"/>
-        </index>
-        <index referenceId="EAV_ATTRIBUTE_LABEL_ATTRIBUTE_ID_STORE_ID" indexType="btree">
             <column name="attribute_id"/>
+        </constraint>
+        <index referenceId="EAV_ATTRIBUTE_LABEL_STORE_ID" indexType="btree">
             <column name="store_id"/>
         </index>
     </table>