COMMIT or ROLLBACK DEPOSIT ROOT UNIQUE_IDENTIFIER command to use
  this command

  Explanation:  A DEPOSIT AREA_HEADER UNIQUE_IDENTIFIER command is
  not  alowed  if  a  DEPOSIT  ROOT  UNIQUE_IDENTIFIER  command is
  currently pending for this RMU/ALTER session.  The DEPOSIT  ROOT
  UNIQUE_IDENTIFIER  command will write the root unique identifier
  to ALL storage area header blocks to insure  database  integrity
  at  COMMIT  time,  so  the DEPOSIT AREA_HEADER UNIQUE_IDENTIFIER
  command is redundant.

  User Action:  The user will  have  to  COMMIT  or  ROLLBACK  the
  current  session  before  he can execute the DEPOSIT AREA_HEADER
  UNIQUE_IDENTIFIER command.