SharePoint 2013 updating a lookup column from another list not working
IP Range: Includes a title column (single line of text) for ip ranges (ex. 10.1.1.x)
IP List: Includes columns for ip range (lookup to IP Range List), ip address (single line of text) and status (lookup IP Status List)
IP Status: Includes Title column (single line of text) with two entries, allocated and unallocated
System List: Includes IP Range (lookup), IP Address (Lookup)
Creating a new item in System List and selecting a range from IP Range loads the "Unallocated" ip address in IP Address Column but doesn't change IP Status List column from "Unallocated" to "Allocated."
How can I make "Unallocated" change to "Allocated" and vice versa?