difference in results when the duration of the model was changed

Hi!

I ran the same model for a longer time (Rotating Machinery, Laminar Flow module) and the resulting velocity and pressure are different. Which one should I trust? Why does this happen?

For the 2 s duration model at 2 s:
Volume velocity range: 0 to 0.5801 m/s
Volume pressure range: -99.33 to 365.86 Pa

For the 5 s duration model at 2 s:
Volume velocity range: 0 to 0.5364 m/s
Volume pressure range: -114.64 to 294.14 Pa

The mesh is the same, as well as the time step and everything else in the model. The only difference was the total duration of the model.

Thank you,
Sylvana