It was perhaps the worst performance of the season against the club that looks set to pick up the NRL's wooden spoon for the third straight year, but the players are left with no choice but to dust themselves off and move on to Sunday's game against the Raiders.
That result ended any hope of the Warriors finishing in the top eight and they've got to get through four meaningless games before the season ends.
Mannering, who has played 276 games for the club, admitted it wasn't easy to get over the Knights defeat.
"To be honest, it was hard," Mannering said.