Difference between `inventoryAdjustQuantities` and `inventoryBulkAdjustQuantityAtLocation`?

Retired Boards Appdev Graphql Basics And Troubleshooting
3

Hello @ShopifyDevSup

I am looking into the same, not sure why we have to use inventoryAdjustQuantities instead of inventoryBulkAdjustQuantityAtLocation if both does the same.

mutation MyMutation {
  inventoryAdjustQuantities(
    input: {reason: "received", name: "available", changes: [
			{delta: 15, inventoryItemId: "gid://shopify/InventoryItem/{id}", locationId: "gid://shopify/Location/{id}"},
			{delta: -10, inventoryItemId: "gid://shopify/InventoryItem/{id}", locationId: "gid://shopify/Location/{id}"}
		
		]},
  ) {
    userErrors {
      field
      message
    }
		  
		    inventoryAdjustmentGroup {
      createdAt
      id
      changes {
        item {
          inventoryLevels(first: 100) {
            nodes {
              item {
                sku
              }
            }
          }
        }
      }
    }
  }
}

And I am not exactly sure how to get the response with quantity, SKU and barcode. I am getting same SKU twice in the inventoryLevels response.

Thanks,
Lily