diff --git a/src/main/java/org/folio/inventory/resources/TenantItems.java b/src/main/java/org/folio/inventory/resources/TenantItems.java
index 400d66f0e..02ec8465e 100644
--- a/src/main/java/org/folio/inventory/resources/TenantItems.java
+++ b/src/main/java/org/folio/inventory/resources/TenantItems.java
@@ -62,7 +62,7 @@ public void register(Router router) {
   private void getItemsFromTenants(RoutingContext routingContext) {
     var getItemsFutures = routingContext.body().asPojo(TenantItemPairCollection.class)
       .getTenantItemPairs().stream()
-      .collect(groupingBy(TenantItemPair::getTenantId, mapping(TenantItemPair::getTenantId, toList())))
+      .collect(groupingBy(TenantItemPair::getTenantId, mapping(TenantItemPair::getItemId, toList())))
       .entrySet().stream()
       .map(tenantToItems -> getItemsWithTenantId(tenantToItems.getKey(), tenantToItems.getValue(), routingContext))
       .toList();