To reproduce:

• start 10.4 server with

  --aria-encrypt-tables=1 --file-key-management --file-key-management-filename=`pwd`/mysql-test/std_data/keys.txt --plugin-load-add=file_key_management

  (note the implied path to the key file and change if necessary)

• run

  create table t (pk int primary key, f date) engine=Aria partition by hash(pk) partitions 2;

  insert into t values (1,'2000-01-01');

• shut down the server normally
• store the datadir
• start 11.5 or higher version on the datadir
• run mariadb-upgrade. It says

  11.5 8b8c8fcb864f4f9753211ad911337201cfe21d23
  test
  test.t
  error : Partition p0 returned error
  error : Table rebuild required. Please do "ALTER TABLE `t` FORCE" or dump/reload to fix it!

• see that the table is still corrupted:

  MariaDB [test]> check table t extended;

  +--------+-------+----------+-------------------------------------------------------------------------------------+

  | Table | Op | Msg_type | Msg_text |

  +--------+-------+----------+-------------------------------------------------------------------------------------+

  | test.t | check | error | Partition p0 returned error |

  | test.t | check | error | Table rebuild required. Please do "ALTER TABLE `t` FORCE" or dump/reload to fix it! |

  +--------+-------+----------+-------------------------------------------------------------------------------------+

  2 rows in set (0.001 sec)

  MariaDB [test]> repair table t;

  +--------+--------+----------+----------+ of stage done

  | Table | Op | Msg_type | Msg_text |

  +--------+--------+----------+----------+

  | test.t | repair | status | OK |

  +--------+--------+----------+----------+

  1 row in set (0.109 sec)

  MariaDB [test]> repair table t extended;

  +--------+--------+----------+----------+

  | Table | Op | Msg_type | Msg_text |

  +--------+--------+----------+----------+

  | test.t | repair | status | OK |

  +--------+--------+----------+----------+

  1 row in set (0.108 sec)

  MariaDB [test]> repair table t force;

  +--------+--------+----------+----------+ of stage done

  | Table | Op | Msg_type | Msg_text |

  +--------+--------+----------+----------+

  | test.t | repair | status | OK |

  +--------+--------+----------+----------+

  1 row in set (0.107 sec)

  MariaDB [test]> check table t extended;

  +--------+-------+----------+-------------------------------------------------------------------------------------+

  | Table | Op | Msg_type | Msg_text |

  +--------+-------+----------+-------------------------------------------------------------------------------------+

  | test.t | check | error | Partition p0 returned error |

  | test.t | check | error | Table rebuild required. Please do "ALTER TABLE `t` FORCE" or dump/reload to fix it! |

  +--------+-------+----------+-------------------------------------------------------------------------------------+

  2 rows in set (0.003 sec)

Before 11.5, mariadb-upgrade also complains about the table, but it fixes it (or, alternatively without prior mariadb-upgrade, REPAIR fixes it). The difference must have come from MDEV-33449.

A pre-created 10.4 datadir is attached.