Please note car has been updated !!!!!!!!!!New version does not cause online mismatch with server.
Are you sure ? This new version has a different folder name than the old one.
The new folder is called "dj_skipbarber_f2000"
So atm now i have two skip cars i can drive the original version 1.3 and the new 1.4.
Did you rename the new folder to the old one ?
taken from update page .
"Skip Barber for Assetto Corsa V1.4
WARNING: Please delete your old skip barber folder, otherwise you will end up with two skippies.
NOTE: your old V1.3 skins will work on this one without any issue."