diff --git a/app/code/Magento/Catalog/etc/db_schema.xml b/app/code/Magento/Catalog/etc/db_schema.xml
index e924e8d804bc0..26fa1c409d505 100644
--- a/app/code/Magento/Catalog/etc/db_schema.xml
+++ b/app/code/Magento/Catalog/etc/db_schema.xml
@@ -884,11 +884,11 @@
         <index referenceId="CATALOG_PRODUCT_ENTITY_MEDIA_GALLERY_VALUE_VALUE_ID" indexType="btree">
             <column name="value_id"/>
         </index>
-        <index referenceId="CAT_PRD_ENTT_MDA_GLR_VAL_ENTT_ID_VAL_ID_STORE_ID" indexType="btree">
+        <constraint referenceId="CAT_PRD_ENTT_MDA_GLR_VAL_ENTT_ID_VAL_ID_STORE_ID_UNQ" xsi:type="unique">
             <column name="entity_id"/>
             <column name="value_id"/>
             <column name="store_id"/>
-        </index>
+        </constraint>
     </table>
     <table name="catalog_product_option" resource="default" engine="innodb" comment="Catalog Product Option Table">
         <column xsi:type="int" name="option_id" unsigned="true" nullable="false" identity="true"