For parquet table, after changing the precision and scale of decimal type in hive, spark reads incorrect value

create table test_decimal(amt decimal(18,2)) stored as parquet; 
insert into test_decimal select 100;
alter table test_decimal change amt amt decimal(19,3);

select * from test_decimal;

+--------+
|    amt |
+--------+
| 10.000 |
+--------+