@Ricardo_Sa On the page the suuport page of tplink i downloaded last firmware of the my deco m9 v.2 insttaled by the browser and you can now reserve a lot mor than 16 devices. Problem solved.

I have deco m9 v2 with firmware version 1.2.10. It is a lack of respect for such expensive equipment to let us reserve only 16 ips. I can't finish my automation, because I need at least 30 reserved...