IPAM erasing entered data from comment field after transient period ends

Hi

How can i get the text entered into the Comment field for an IP adddress to stay there even if it goes from "Used" to "Transient" then to "Available"?

Currently if i enter in text into the comment field when its in the Used status its fine, but if the node goes offline for 7 days the address is changed to Available and all the entered text is lost.

Im using IPAM 2.0.1

Please help.

Thanks