Changing INTERVAL of SYSTEM_TIME partitioning does not move history to the new partitions

set @@session.time_zone='+00:00';

create table t1 (x int,

  row_start timestamp(6) as row start invisible,

  row_end timestamp(6) as row end invisible,

  period for system_time (row_start, row_end)) with system versioning

partition by system_time interval 1 hour

starts '2000-01-01 00:00:00' partitions 4;

set timestamp= unix_timestamp('2000-01-01 00:30:00');

insert t1 values (0);

set timestamp= unix_timestamp('2000-01-01 01:30:00');

update t1 set x= 1;

set timestamp= unix_timestamp('2000-01-01 02:30:00');

update t1 set x= 2;

alter table t1 partition by system_time interval 2 hour

starts '2000-01-01 00:00:00';

select x, row_end from t1 partition (p0);

select x, row_end from t1 partition (p1);

select x, row_end from t1 partition (p0);

x	row_end

select x, row_end from t1 partition (p1);

x	row_end

0	2000-01-01 01:30:00.000000

select x, row_end from t1 partition (p0);

x	row_end

0	2000-01-01 01:30:00.000000

select x, row_end from t1 partition (p1);

x	row_end

1	2000-01-01 02:30:00.000000

memcmp(&part_info->vers_info->interval,

       &tab_part_info->vers_info->interval,

       sizeof(Vers_part_info::interval))

part_info->vers_info->interval == tab_part_info->vers_info->interval