Micronaut Data fails with MariaDb with charset utf8mb4

After upgrading from micronaut 1.3.7 to 2.1.4 we get the following error Error executing SQL UPDATE: (conn=18) Invalid utf8mb4 character string: 'ACED00' when updating an entity.

Table definition:

CREATE TABLE `test_entity`
(
    `id`       varchar(36) NOT NULL,
    `name`     varchar(30) NOT NULL,
    `created`  datetime    NOT NULL,
    `modified` datetime    NOT NULL,
    PRIMARY KEY (`id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4
  COLLATE = utf8mb4_unicode_ci;

Everythings works fine, as soon as we change the table definition to:

CREATE TABLE `test_entity`
(
    `id`       varchar(36) NOT NULL,
    `name`     varchar(30) NOT NULL,
    `created`  datetime    NOT NULL,
    `modified` datetime    NOT NULL,
    PRIMARY KEY (`id`)
) ENGINE = InnoDB;

To reproduce the error run ./gradlew test. The WorkingSpec class uses a flyway migration without uft8 settings and the FailingSpec class uses a flyway migration with uft8 settings.

To see that everything was working fine on micronaut 1.3.7 (micronaut-data 1.0.1) check out the mn-1.3.7 branch and run the tests.