illustrator why when i click make to convert to live paint why does the stroke profile change

I have changed uniform line to shaped line profile and when I click make to convert to live paint I get a dialog box which says" complex visual appearance objects ... may be lost when converting to a live paint group. This has not happened in other files I am working on (athough plenaty of other things d0). I am new to illustrator. Is it to do with flattening? grouping? Please help!