Since the redo log group is inactive and is archived, just clear the redo log - alter database clear logfile group N (where N is the group # of the lost redo log)
由于重做日志组是不活动和归档的,所以只需清除重做日志即可 —— alter database clear logfile group N(其中 N 是丢失的重做日志的组 #)。