Migration not starting with mongock 4.3.8

Question

I am trying to create indexes on a mongodb collection using mongock version 4.3.8. The mongockLock and mongockChangeLog collections are eventually created, but the migration itself does not run. mongockChangeLog table is empty. Query db.BOOKS.getIndexes(); returns a single string: with an index for id (the value of name in it is equal to _id_), which is most likely generated automatically. There are no obvious errors in the logs either.

Everything else seems to be set up correctly, I don't understand why my migration is not running.

build.gradle.kts:

implementation("com.github.cloudyrock.mongock:mongodb-springdata-v3-driver:4.3.8")
implementation("com.github.cloudyrock.mongock:mongock-spring-v5:4.3.8")
implementation(platform("com.github.cloudyrock.mongock:mongock-bom:4.3.8"))

application.yml:

mongock:
  change-logs-scan-package:
    - com.dreamland.configuration.migration

config file:

@EnableMongock
@Configuration
@EnableMongoAuditing
class MongoConfig

Migration file:

@ChangeLog(order = "1668471203")
class IndexChangeLog {

    companion object : KLogging()

    @ChangeSet(order = "1668471204", id = "1668471204_create_indexes", author = "Irish")
    fun createIndexes(mongockTemplate: MongockTemplate) {

        val indexOps = mongockTemplate.indexOps(BookObjectDocument::class.java)

        Index().on("createdAt", Sort.Direction.DESC).let { indexOps.ensureIndex(it) }.also { log(it) }
        Index().on("createdBy", Sort.Direction.ASC).let { indexOps.ensureIndex(it) }.also { log(it) }
        Index().on("type", Sort.Direction.DESC).let { indexOps.ensureIndex(it) }.also { log(it) }
    }

    private fun log(indexName: String) {
        logger.info { "Index '$indexName' was created successfully" }
    }
}

Document class:

@Document(collection = "BOOKS_V2")
data class BookObjectDocument(
    val type: BookObjectType?,
    val description: String?
) {
    @Id
    lateinit var id: String

    @CreatedDate
    lateinit var createdAt: Instant

    @CreatedBy
    var createdBy: String? = null
}