Setting up API for IPAM reservations

Hello,

One of our teams is trying to create an applet that will assign IP address reservations directly to the IPAM tables.  His script is as follows:

UPDATEIPAM_NodeSetStatus= 1,Description='Assigned by Automation'

WHEREIPAddress='xxx.xxx.xxx.xxx'

The script seemed to work fine at first, with the required IP address showing as Used.  However, when I look at the subnet utlization, it shows 0 IP's used.  So, it seems that the there is another table that needs to be update.  Do any of you know which additional table(s) need to be updated as well?  Thanks in advance.