A REDUCE LOG command has been entered, but the recovery log mode of the server is currently set to ROLLFORWARD. The recovery log can only be reduced when the log mode is set to NORMAL with a SET LOGMODE command.
The server does not process the command.
Set the log mode to NORMAL with the SET LOGMODE command, reissue the REDUCE LOG command, and set the log mode back to ROLLFORWARD with the SET LOGMODE command. If you change the log mode to NORMAL, you can only recover your database to the time of the last complete database backup.