What does pviol represent in nvidia-smi?

I’m having some stability issues with a server. I’m logging nvidia-smi and seeing 100% pviol on one of the GPU boards (A4000). What does it mean?

# gpu    pwr  gtemp  mtemp     sm    mem    enc    dec  pviol  tviol 
# Idx      W      C      C      %      %      %      %      %   bool 
    0      8     33      -     0      0      0      0      0      0 
    1      6     35      -     0      0      0      0      0      0 
    2      7     34      -     0      0      0      0      0      0 
    0      8     33      -     0      0      0      0    100      0 
    1      7     35      -     0      0      0      0      0      0 
    2      7     34      -     0      0      0      0      0      0