Problem with node Set Phase To None

i have a problem with the node set phase to none
when i set the phase demolished in this dynamo file to none it gives a warning

see images

Don’t you need any input in this node?

i don’t no

i tried 0
i tried 1
i tried “None”;
nothing works

last week it worked in another file (i think without any input)
but today the node is not working in any file

Hi Yna

problem solved

in another file i used it the right way
just forgot about it