Defect 501915 : Inventory Status Feature = T > Replenish Location By Inventory Transfer > Regular Inventory Items > Please configure the inventory detail in line 1 of the inventory list.
Alternate Solution: Before saving the page, click each Inventory Detail and click OK even when they are already populated.
The Urgency level assigned to your defect is U7. Based on the information you provided, this Defect has been categorized as a very low priority defect and because it has no impact on your business running on NetSuite, we currently do not plan on investigating this issue.