When the ctas from a big table is interrupted ,then you can't drop or recreate the table!

MariaDB [lfdb]> create table t5 as select * from t1;
^CCtrl-C – query killed. Continuing normally.
ERROR 1317 (70100): Query execution was interrupted
MariaDB [lfdb]> create table t5 as select * from t1;
ERROR 1813 (HY000): Tablespace for table '`lfdb`.`t5`' exists. Please DISCARD the tablespace before IMPORT

try to delete the tablespace
[root@19c lfdb]# rm t5.ibd
rm: remove regular file ‘t5.ibd’? y
[root@19c lfdb]# ls
db.opt t1.frm t1.ibd t2.frm t2.ibd t3.frm t3.ibd t4.frm t4.ibd

try to recreate the table
MariaDB [lfdb]> truncate table t5;
ERROR 1146 (42S02): Table 'lfdb.t5' doesn't exist
MariaDB [lfdb]> create table t5 as select * from t1;
ERROR 1050 (42S01): Table '`lfdb`.`t5`' already exists
MariaDB [lfdb]> drop table t5;
ERROR 1051 (42S02): Unknown table 'lfdb.t5'

why? and how do i fix this?
Thanks.