Android SQLiteConstraintException: код ошибки 19: ограничение не удалось

Я видел и другие вопросы об этом исключении, но все они, похоже, решаются с помощью решения, что строка с указанным первичным ключом уже существует. Мне кажется, что это не так. Я попытался заменить все одинарные кавычки в своих строках двойными, но возникла та же проблема.

Я пытаюсь вставить строку в таблицу настроек базы данных SQLite, которую я создал, выполнив следующие действия:

db.execSQL("DROP TABLE IF EXISTS "+Settings.SETTINGS_TABLE_NAME + ";");
db.execSQL(CREATE_MEDIA_TABLE);
db.execSQL(CREATE_SETTINGS_TABLE);
Cursor c = getAllSettings();
//If there isn't already a settings row, create a row full of defaults
if(c.getCount()==0){
    ContentValues cv  = new ContentValues();
    cv.put(Settings.SETTING_UNIQUE_ID, "'"+Settings.uniqueID+"'");          
    cv.put(Settings.SETTING_DEVICE_ID, Settings.SETTING_DEVICE_ID_DEFAULT);
    cv.put(Settings.SETTING_CONNECTION_PREFERENCE, Settings.SETTING_CONNECTION_PREFERENCE_DEFAULT);
    cv.put(Settings.SETTING_AD_HOC_ENABLED, Settings.SETTING_AD_HOC_ENABLED_DEFAULT);
    cv.put(Settings.SETTING_SERVER_ADDRESS, Settings.SETTING_SERVER_ADDRESS_DEFAULT);
    cv.put(Settings.SETTING_RECORDING_MODE, Settings.SETTING_RECORDING_MODE_DEFAULT);
    cv.put(Settings.SETTING_PREVIEW_ENABLED, Settings.SETTING_PREVIEW_ENABLED_DEFAULT);
    cv.put(Settings.SETTING_PICTURE_RESOLUTION_X, Settings.SETTING_PICTURE_RESOLUTION_X_DEFAULT);
    cv.put(Settings.SETTING_PICTURE_RESOLUTION_Y, Settings.SETTING_PICTURE_RESOLUTION_Y_DEFAULT);
    cv.put(Settings.SETTING_VIDEO_RESOLUTION_X, Settings.SETTING_VIDEO_RESOLUTION_X_DEFAULT);
    cv.put(Settings.SETTING_VIDEO_RESOLUTION_Y, Settings.SETTING_VIDEO_RESOLUTION_Y_DEFAULT);
    cv.put(Settings.SETTING_VIDEO_FPS, Settings.SETTING_VIDEO_FPS_DEFAULT);
    cv.put(Settings.SETTING_AUDIO_BITRATE_KBPS, Settings.SETTING_AUDIO_BITRATE_KBPS_DEFAULT);
    cv.put(Settings.SETTING_STORE_TO_SD, Settings.SETTING_STORE_TO_SD_DEFAULT);
    cv.put(Settings.SETTING_STORAGE_LIMIT_MB, Settings.SETTING_STORAGE_LIMIT_MB_DEFAULT);

    this.db.insert(Settings.SETTINGS_TABLE_NAME, null, cv);
}

Строка CREATE_SETTINGS_TABLE определяется следующим образом:

private static String CREATE_SETTINGS_TABLE = "CREATE TABLE IF NOT EXISTS " + Settings.SETTINGS_TABLE_NAME + "("
+ Settings.SETTING_UNIQUE_ID + " TEXT NOT NULL PRIMARY KEY, "
+ Settings.SETTING_DEVICE_ID + " TEXT NOT NULL , "
+ Settings.SETTING_CONNECTION_PREFERENCE + " TEXT NOT NULL CHECK("+Settings.SETTING_CONNECTION_PREFERENCE+" IN("+Settings.SETTING_CONNECTION_PREFERENCE_ALLOWED+")), "
+ Settings.SETTING_AD_HOC_ENABLED + " TEXT NOT NULL CHECK("+Settings.SETTING_AD_HOC_ENABLED+" IN("+Settings.SETTING_AD_HOC_ENABLED_ALLOWED+")), "
+ Settings.SETTING_SERVER_ADDRESS + " TEXT NOT NULL, "
+ Settings.SETTING_RECORDING_MODE + " TEXT NOT NULL CHECK("+Settings.SETTING_RECORDING_MODE+" IN("+Settings.SETTING_RECORDING_MODE_ALLOWED+")), "
+ Settings.SETTING_PREVIEW_ENABLED + " TEXT NOT NULL CHECK("+Settings.SETTING_PREVIEW_ENABLED+" IN("+Settings.SETTING_PREVIEW_ENABLED_ALLOWED+")), "
+ Settings.SETTING_PICTURE_RESOLUTION_X + " TEXT NOT NULL, "
+ Settings.SETTING_PICTURE_RESOLUTION_Y + " TEXT NOT NULL, "
+ Settings.SETTING_VIDEO_RESOLUTION_X + " TEXT NOT NULL, "
+ Settings.SETTING_VIDEO_RESOLUTION_Y + " TEXT NOT NULL, "
+ Settings.SETTING_VIDEO_FPS + " TEXT NOT NULL, "
+ Settings.SETTING_AUDIO_BITRATE_KBPS + " TEXT NOT NULL, "
+ Settings.SETTING_STORE_TO_SD + " TEXT NOT NULL CHECK("+Settings.SETTING_STORE_TO_SD+" IN("+Settings.SETTING_STORE_TO_SD_ALLOWED+")), "
+ Settings.SETTING_STORAGE_LIMIT_MB + " TEXT NOT NULL )";

Однако, когда я выполняю свою вставку, я всегда получаю:

03-19 19:37:36.974: ERROR/Database(386): Error inserting server_address='0.0.0.0' storage_limit='-1' connection='none' preview_enabled='0' sd_enabled='1' video_fps='15' audio_bitrate='96' device_id='-1' recording_mode='none' picture_resolution_x='-1' picture_resolution_y='-1' unique_id='000000000000000' adhoc_enable='0' video_resolution_x='320' video_resolution_y='240'
03-19 19:45:34.284: ERROR/Database(446): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed

Кажется, что все столбцы в моей вставке не равны нулю. Первичный ключ строки ДОЛЖЕН быть уникальным, потому что это единственная строка в таблице. Следовательно, единственное, о чем я могу думать, это то, что мои условия CHECK не верны. Вот стандартные строки, которые я использую:

public static final String SETTING_UNIQUE_ID = "unique_id";

public static final String SETTING_DEVICE_ID = "device_id";
public static final String SETTING_DEVICE_ID_DEFAULT = "'-1'";

public static final String SETTING_CONNECTION_PREFERENCE = "connection";
public static final String SETTING_CONNECTION_PREFERENCE_3G = "'3g'";
public static final String SETTING_CONNECTION_PREFERENCE_WIFI = "'wifi'";
public static final String SETTING_CONNECTION_PREFERENCE_NONE = "'none'";
public static final String SETTING_CONNECTION_PREFERENCE_ALLOWED = SETTING_CONNECTION_PREFERENCE_3G+","+SETTING_CONNECTION_PREFERENCE_WIFI+","+SETTING_CONNECTION_PREFERENCE_NONE;
public static final String SETTING_CONNECTION_PREFERENCE_DEFAULT = SETTING_CONNECTION_PREFERENCE_NONE;

public static final String SETTING_AD_HOC_ENABLED = "adhoc_enable";
public static final String SETTING_AD_HOC_ENABLED_ALLOWED = TRUE+","+FALSE;
public static final String SETTING_AD_HOC_ENABLED_DEFAULT = FALSE;

public static final String SETTING_SERVER_ADDRESS = "server_address";
public static final String SETTING_SERVER_ADDRESS_DEFAULT = "'0.0.0.0'";

public static final String SETTING_RECORDING_MODE = "recording_mode";
public static final String SETTING_RECORDING_MODE_VIDEO = "'video'";
public static final String SETTING_RECORDING_MODE_AUDIO = "'audio'";
public static final String SETTING_RECORDING_MODE_PICTURE = "'picture'";
public static final String SETTING_RECORDING_MODE_NONE = "'none'";
public static final String SETTING_RECORDING_MODE_ALLOWED = SETTING_RECORDING_MODE_VIDEO+","+SETTING_RECORDING_MODE_AUDIO+","+SETTING_RECORDING_MODE_PICTURE+","+SETTING_RECORDING_MODE_NONE;
public static final String SETTING_RECORDING_MODE_DEFAULT = SETTING_RECORDING_MODE_NONE;

public static final String SETTING_PREVIEW_ENABLED = "preview_enabled";
public static final String SETTING_PREVIEW_ENABLED_ALLOWED = TRUE+","+FALSE;
public static final String SETTING_PREVIEW_ENABLED_DEFAULT = FALSE;

public static final String SETTING_PICTURE_RESOLUTION_X = "picture_resolution_x";
public static final String SETTING_PICTURE_RESOLUTION_X_DEFAULT = "'-1'";

public static final String SETTING_PICTURE_RESOLUTION_Y = "picture_resolution_y";
public static final String SETTING_PICTURE_RESOLUTION_Y_DEFAULT = "'-1'";

public static final String SETTING_VIDEO_RESOLUTION_X = "video_resolution_x";
public static final String SETTING_VIDEO_RESOLUTION_X_DEFAULT = "'320'";

public static final String SETTING_VIDEO_RESOLUTION_Y = "video_resolution_y";
public static final String SETTING_VIDEO_RESOLUTION_Y_DEFAULT = "'240'";

public static final String SETTING_VIDEO_FPS = "video_fps";
public static final String SETTING_VIDEO_FPS_DEFAULT = "'15'";

public static final String SETTING_AUDIO_BITRATE_KBPS = "audio_bitrate";
public static final String SETTING_AUDIO_BITRATE_KBPS_DEFAULT = "'96'";

public static final String SETTING_STORE_TO_SD = "sd_enabled";
public static final String SETTING_STORE_TO_SD_ALLOWED = TRUE+","+FALSE;
public static final String SETTING_STORE_TO_SD_DEFAULT = TRUE;

public static final String SETTING_STORAGE_LIMIT_MB = "storage_limit";
public static final String SETTING_STORAGE_LIMIT_MB_DEFAULT = "'-1'";

public static final String SETTING_CLIP_LENGTH_SECONDS = "clip_length";
public static final String SETTING_CLIP_LENGTH_SECONDS_DEFAULT = "'300'";

Кто-нибудь видит, что может происходить? Я в тупике. Заранее спасибо.