Hot Standby is active and AIJ  switch-over  suspended  -  backup
  existing journals first

  Explanation:  The AIJ switch-over  operation  is  suspended  and
  performing  the requested AIJ journal creation while Hot Standby
  is active could result in replication being terminated.

  User Action:  It is recommended to backup one or  more  existing
  AIJ journals before creating the new AIJ journal(s).