  Producing kaon mesons in heavy-ion collisions at beam energies below their
threshold energy is an important way to investigate the properties of dense
nuclear matter. In this study, based on the newly updated version of the
ultrarelativistic quantum molecular dynamics model, we introduce the
kaon-nucleon (KN) potential, including both the scalar and vector (also dubbed
Lorentz-like) aspects. We revisit the influence of the KN potential on the
collective flow of K$^{+}$ mesons produced in Au+Au collisions at $E_{lab}$ =
1.5 GeV/nucleon and find that the contribution of the newly included
Lorentz-like force is very important, particulary for describing the directed
flow of K$^{+}$. Finally, the corresponding KaoS data of both directed and
elliptic flows can be simultaneously reproduced well.
