PVS-Studio warning V501 for CrashServer

class FileMedia: public ILogMedia
{
  ....
  WORD m_wLogYear, m_wLogMonth, m_wLogDay;
  ....
};

void FileMedia::Write(....)
{
  ....
  if (st.wDay != m_wLogDay ||
      st.wMonth != m_wLogMonth ||
      st.wDay != m_wLogDay)
  ....
}

This suspicious code was found in CrashServer project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions 'st.wDay != m_wLogDay' to the left and to the right of the '||' operator. log.cpp 683

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/