In Services|Services|DHCP Server|Static Leases table I have 3 empty rows (screenshot below).
Yet when I click Add, fill all fields in newly created row of table and click Save I get popup window with error "is already defined as a static lease". Any ideas?
That's what I did after reading your post. I did 30-30-30 reset, added one rule and pressed Apply Settings button.
Thanks for your time and help. Silly me - I kept pressing Add button after filling out a new row and before pressing Save button.
Actually clicking "Save" after filling out every new entry and then "Apply Settings" at the end when all entries were added and saved is enough, isn't it?
The other thing that throws this up is if you have clicked the "add" button twice or more and you have more than one line of empty entry boxes. To remove the empty ones place your cursor in the first box of the extra line and click "remove".