PSG had a three-point lead over second-placed Montpellier at the winter break last season before losing out to the unfancied challengers, who claimed their first French title in May.
Qatari-backed PSG, who host lowly Ajaccio on Friday, head the standings again, albeit on goal difference from Olympique Lyon and Olympique Marseille.
"We cannot afford another collapse after having been leaders at the winter break," France fullback Jallet told a news conference.
"Last season, we had a rough patch which cost us a lot of points. So we know we can not take anything for granted."
"It was the start of the season and we were struggling collectively. It will be completely different this time... our scoring power is obvious," Jallet said.
"We want to move forward after this accident. We are not going to question all that we have done so far and there is no additionnal pressure," midfielder Gueida Fofana, one of the players who missed a penalty in the decisive shootout, said.
Troyes, who have the league's second worst defence with 37 goals conceded in 19 games, are unbeaten in their last three matches in all competitions.
