I am unfamiliar and I can only recommend you reach out directly to where you received this report. There should be a contact number as to where you can get some clarification.
I also recommend, if you are unable to find another tenant that meets your NTN requirements, simply let this tenant know there are a few factors that show higher risk on renting to him/her, and then simply ask "Are you able to put up one extra month's rent in advance and maintain rent on time?"
This would allow you the additional peace of mind, and it would allow your tenant to get in. (ultimately this is simply increasing the deposit and that;s how it should be written up on Lease, however, if you present it in this way, it may be absorbed easier)... more