Issue #3455821: Add check additional Schema.org mappings flag

Closes #3455821

modules/schemadotorg_entity_reference_override/src/SchemaDotOrgEntityReferenceOverrideManager.php

@@ -96,8 +96,7 @@ class SchemaDotOrgEntityReferenceOverrideManager implements SchemaDotOrgEntityRe
       return;
     }
 
-    $schema_properties = $mapping->getAllSchemaProperties();
-    $schema_property = $schema_properties[$items->getName()] ?? NULL;
+    $schema_property = $mapping->getSchemaPropertyMapping($items->getName());
     if (!$schema_property) {
       return;
     }