diff --git a/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/service/ProductStockResponseApiServiceImpl.java b/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/service/ProductStockResponseApiServiceImpl.java
index af3f39c6..01485f0c 100644
--- a/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/service/ProductStockResponseApiServiceImpl.java
+++ b/backend/src/main/java/org/eclipse/tractusx/puris/backend/stock/logic/service/ProductStockResponseApiServiceImpl.java
@@ -24,10 +24,6 @@
 import lombok.extern.slf4j.Slf4j;
 import org.eclipse.tractusx.puris.backend.stock.domain.model.ProductStockRequest;
 import org.eclipse.tractusx.puris.backend.common.api.domain.model.datatype.DT_RequestStateEnum;
-import org.eclipse.tractusx.puris.backend.common.api.logic.dto.MessageContentDto;
-import org.eclipse.tractusx.puris.backend.common.api.logic.dto.MessageContentErrorDto;
-import org.eclipse.tractusx.puris.backend.common.api.logic.dto.ResponseDto;
-import org.eclipse.tractusx.puris.backend.common.api.logic.service.ResponseApiService;
 import org.eclipse.tractusx.puris.backend.masterdata.domain.model.Partner;
 import org.eclipse.tractusx.puris.backend.masterdata.logic.service.PartnerService;
 import org.eclipse.tractusx.puris.backend.stock.domain.model.PartnerProductStock;
@@ -40,7 +36,6 @@
 import org.springframework.stereotype.Component;
 
 import java.util.List;
-import java.util.UUID;
 
 /**
  * Service implements the handling of a response for Product Stock
@@ -108,20 +103,19 @@ public void consumeResponse(ProductStockResponse response) {
                     log.info(String.format("Created Partner ProductStock from SAMM: %s",
                             createdPartnerProductStock));
                 } else {
+                    // update quantity only
+                    PartnerProductStock existingPartnerProductStock = existingPartnerProductStocks.get(0);
+                    existingPartnerProductStock.setQuantity(partnerProductStockDto.getQuantity());
+
                     PartnerProductStock updatedPartnerProductStock =
-                            partnerProductStockService.update(existingPartnerProductStocks.get(0));
+                            partnerProductStockService.update(existingPartnerProductStock);
                     log.info(String.format("Updated Partner ProductStock from SAMM: %s",
                             updatedPartnerProductStock));
                 }
         }
+
         // Update status - also only MessageContentErrorDtos would be completed
         productStockRequestService.updateState(correspondingProductStockRequest, DT_RequestStateEnum.COMPLETED);
     }
 
-    private ProductStockRequest findCorrespondingRequest(ResponseDto responseDto) {
-        UUID requestId = responseDto.getHeader().getRequestId();
-        return productStockRequestService.findRequestByHeaderUuid(requestId);
-
-    }
-
 }
diff --git a/frontend/src/views/StockView.vue b/frontend/src/views/StockView.vue
index 360c8c6e..a79cbe49 100644
--- a/frontend/src/views/StockView.vue
+++ b/frontend/src/views/StockView.vue
@@ -180,12 +180,12 @@ export default {
   methods: {
     addOrUpdateStock(changedStock) {
       if (changedStock.type === "Material") {
-        var existingMaterialStock = this.bdMaterialStocks.filter(
+        var existingMaterialStocks = this.bdMaterialStocks.filter(
             (stock) => (stock.material.uuid === changedStock.materialId)
         );
 
-        if (existingMaterialStock.length === 1) { // Update existing material stock
-          var existingMaterialStock = existingMaterialStock[0];
+        if (existingMaterialStocks.length === 1) { // Update existing material stock
+          var existingMaterialStock = existingMaterialStocks[0];
           existingMaterialStock.quantity = changedStock.quantity;
 
           this.putData(this.backendURL + this.endpointMaterialStocks, existingMaterialStock);