deleter().execute() fails when using Direct Associations

[hATrayflood]

V/Orma: [RxCachedThreadScheduler-1] DELETE FROM `CD` WHERE ((`c1`.`ab` = ?)) - [0]
E/SQLiteLog: (1) no such column: c1.ab
W/System.err: io.reactivex.exceptions.OnErrorNotImplementedException: no such column: c1.ab (code 1 SQLITE_ERROR): , while compiling: DELETE FROM `CD` WHERE ((`c1`.`ab` = ?))
W/System.err:     at io.reactivex.internal.observers.EmptyCompletableObserver.onError(EmptyCompletableObserver.java:51)
W/System.err:     at io.reactivex.internal.operators.completable.CompletableSubscribeOn$SubscribeOnObserver.onError(CompletableSubscribeOn.java:74)
W/System.err:     at io.reactivex.internal.operators.completable.CompletableCreate$Emitter.tryOnError(CompletableCreate.java:90)
W/System.err:     at io.reactivex.internal.operators.completable.CompletableCreate$Emitter.onError(CompletableCreate.java:76)
W/System.err:     at io.reactivex.internal.operators.completable.CompletableCreate.subscribeActual(CompletableCreate.java:42)
W/System.err:     at io.reactivex.Completable.subscribe(Completable.java:2171)
W/System.err:     at io.reactivex.internal.operators.completable.CompletableSubscribeOn$SubscribeOnObserver.run(CompletableSubscribeOn.java:64)
W/System.err:     at io.reactivex.Scheduler$DisposeTask.run(Scheduler.java:579)
W/System.err:     at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66)
W/System.err:     at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:266)
W/System.err:     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
W/System.err:     at java.lang.Thread.run(Thread.java:764)
W/System.err: Caused by: android.database.sqlite.SQLiteException: no such column: c1.ab (code 1 SQLITE_ERROR): , while compiling: DELETE FROM `CD` WHERE ((`c1`.`ab` = ?))
W/System.err:     at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
W/System.err:     at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:903)
W/System.err:     at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:514)
W/System.err:     at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
W/System.err:     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
W/System.err:     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
W/System.err:     at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1086)
W/System.err:     at com.github.gfx.android.orma.core.DefaultDatabase.compileStatement(DefaultDatabase.java:53)
W/System.err:     at com.github.gfx.android.orma.OrmaConnection.delete(OrmaConnection.java:331)
W/System.err:     at com.github.gfx.android.orma.Deleter.execute(Deleter.java:49)
W/System.err:     at com.example.app.MainActivity$onCreate$2.subscribe(MainActivity.kt:50)
W/System.err:     at io.reactivex.internal.operators.completable.CompletableCreate.subscribeActual(CompletableCreate.java:39)
W/System.err: 	... 10 more

AB.kt

@Table
class AB {
    @PrimaryKey
    var id: Long = 0

    @Column
    var name: String? = null
}

CD.kt

@Table
class CD {
    @PrimaryKey
    var id: Long = 0

    @Column
    var name: String? = null

    @Column(indexed = true)
    var ab: AB? = null
}

MainActivity.kt

        Completable.create { emitter ->
            db.relationOfCD().abEq(AB()).deleter().execute()
        }.subscribeOn(Schedulers.io()).subscribe()