How to update all attributes of a row except Unique Constraint attribute in Android SQLITE?

I am working on an android app. In database I have a column that applied Unique Constraint. CreateEntry Method Working Perfectly.

Now In Create Entry Method I want to update all attributes except Unique Attribute.

My Current Code Goes Here:

Creating Table

  public void onCreate(SQLiteDatabase db) {
            db.execSQL("CREATE TABLE " + DATABASE_TABLE1 + " (" + KEY_ROWID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_NOTE
                    + " TEXT NULL, " + KEY_NUMBER + " TEXT NOT NULL UNIQUE);"

            );

CreateEntry Method In Database Class

public long createEntry(String number, String note) throws SQLException {

    ContentValues cv = new ContentValues();

    cv.put(KEY_NUMBER, number);
    cv.put(KEY_NOTE, note);
    return callBlockerDatabase.insert(DATABASE_TABLE1, null, cv);
}

as KEY_NUMBER is unique attribute.

First attempt: i passed "123" as number and "abc" as note to CreateEntry Method.

2nd Attempt: I passed "123" as number and "xyz" as note.

In second attempt I want to Update "xyz" as note a in specified row.

Please help me to update CreateEntry Method for achieving mentioned goal ?