mikro-orm: PK columnType 'bigint' throws invalid type error for string when using QueryBuilder

Describe the bug I’m using MariaDB. The PK is columnType ‘bigint’ (auto-increment), the entity uses type string, which I would prefer.

EntityValidator.validateProperty() throws:

ValidationError: Trying to set Object.id of type 'string' to '1' of type 'number'

Stack trace

Trying to set Object.id of type 'string' to '1' of type 'number' - {
stack: [
  "ValidationError: Trying to set Object.id of type 'string' to '1' of type 'number'\n" +
    '    at Function.fromWrongPropertyType (/usr/src/app/node_modules/@mikro-orm/core/errors.js:22:16)\n' +
    '    at EntityValidator.validateProperty (/usr/src/app/node_modules/@mikro-orm/core/entity/EntityValidator.js:62:44)\n' +
    '    at /usr/src/app/node_modules/@mikro-orm/core/EntityManager.js:473:42\n' +
    '    at Array.forEach (<anonymous>)\n' +
    '    at SqlEntityManager.map (/usr/src/app/node_modules/@mikro-orm/core/EntityManager.js:470:27)\n' +
    '    at /usr/src/app/node_modules/@mikro-orm/knex/query/QueryBuilder.js:411:37\n' +
    '    at Array.map (<anonymous>)\n' +
    '    at QueryBuilder.getResultList (/usr/src/app/node_modules/@mikro-orm/knex/query/QueryBuilder.js:411:20)\n' +
    '    at processTicksAndRejections (node:internal/process/task_queues:96:5)'
]
}

To Reproduce Steps to reproduce the behavior:

1. Create entity with @PrimaryKey({ columnType: 'bigint' })

@Entity()
export class TblTest {
  @PrimaryKey({ columnType: 'bigint' })
  id!: string;
}

1. Run as QueryBuilder select query

const qb = em.qb(TblTest)
await qb.select('*')

Expected behavior EntityValidator.validateProperty() to accept string type for ‘bigint’ columnType on MySQL/MariaDB db.

Additional context It does work if I change the type id!: number;

Versions

“@mikro-orm/cli”: “^5.3.1”, “@mikro-orm/core”: “^5.3.1”, “@mikro-orm/mariadb”: “^5.3.1”, “@mikro-orm/nestjs”: “^5.1.1”, “typescript”: "^4.3.5