Wrong mass of kaon+?

Dear experts,

The following error is causing some detector simulations to fail,

------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : DECAY003
      issued by : G4Decay::DoIt
Can not determine decay channel for kaon+
  mass of dynamic particle: 0.000205697 (GEV)
  dacay table has 6 entries
0: BR 0.6355, IsOK? 0, --> mu+ + nu_mu
1: BR 0.2066, IsOK? 0, --> pi+ + pi0
2: BR 0.0559, IsOK? 0, --> pi+ + pi+ + pi-
3: BR 0.0507, IsOK? 0, --> pi0 + e+ + nu_e
4: BR 0.0335, IsOK? 0, --> pi0 + mu+ + nu_mu
5: BR 0.01761, IsOK? 0, --> pi+ + pi0 + pi0

I noticed that the mass of the kaon is lower than expected, is that ok?

Thank you for your time.

Best,
Alvaro