10001007 
Message
Warehouse %s is locked for item %s
Diagnosis
From the SAP Business One Main Menu, you have opened a new sales or purchasing document.
You have attempted to add an item to the document you opened in step 1, but you cannot proceed because a warehouse is locked for that item.
Procedure
Note
If you are not a superuser, you may need to ask a superuser to perform the procedure below.
End of the note.
To unlock a warehouse for an item:
From the SAP Business One Main Menu, choose
Inventory 
Item Master Data 
.In the Item Master Data window, open the item that is locked.
On the Inventory Data tab, in the Locked column, deselect the checkbox.