unexplained pop-up window in orcaslicer

[kinosA1]

hello
I get a warning when I laminate a figure and I don't understand why.
before I did not get it and I did not change anything, could you explain me how to solve it?
the message is this :
(only the first extrusion length for small area infill compensation model can be 0 )
I have a K1 with the root performed in fluid