open class PendingPhone : RealmObject {

      @PrimaryKey
      var pendingId: String = ""
      var client: Client? = null
      var dealtId: Long = 0
      var clientId: Long = 0
      var phoneType: PhoneType? = null
      var phoneColorType: PhoneColorType? = null
      var phoneOwnerType: PhoneOwnerType? = null
      var phoneNumber: String = ""
      var description: String? = null
      var creatingDate: Long = 0
      var syncDate: Long? = null
}

  val creatingDate = Instant.now().toEpochMilli()
  val newPhone = PendingPhone().apply {
     this.pendingId = pendingId
     this.debtor = debtor
     this.debtId = debtId
     this.debtorId = debtor.debtorId
     this.phoneType = phoneType
     this.phoneColorType = null
     this.phoneOwnerType = phoneOwnerType
     this.phoneNumber = phoneNumber
     this.description = description
     this.creatingDate = creatingDate
     this.syncDate = null
  }

  realmTemplate.executeInRealm { realm ->
     realm.copyToRealm(newPhone)
  }

 suspend fun <T> executeInRealm(code: (MutableRealm) -> T): = realm.writeBlocking {
    code.invoke(this)
}

Stacktrace below :

java.lang.IllegalArgumentException: Cannot import an outdated object. Use findLatest(object) to find an up-to-date version of the object in the given context before importing it.