On a wake of his 1st Italian Campaign general Bonaparte (with the help of the same people as in OTL) stages a coup, which makes him 1st Consul. Immediate consequences:
Malta remains in the hands of the Knights.
French navy is not destroyed at Abukir.
Emperor Paul I does not join anti-French coalition because "France got a king if not by name than by substance". As a result, Austria does not risk to go to war and there is no 2nd Coalition.