Android : How to update display name with email id?

I am trying to update a contact display name & email.After lot of efforts achieve that from following code snipet.But there is a issue any name I supply for update it appended 2 after it when I see it in contact app. ArrayList ops = new ArrayList();

    ops.add(ContentProviderOperation
            .newUpdate(
                    ContactsContract.Data.CONTENT_URI)

            .withSelection(
                    ContactsContract.CommonDataKinds.Email.CONTACT_ID
                            + " = ?",
                    new String[] { String.valueOf(model
                            .getContactid()) })
            .withValue(ContactsContract.Data.MIMETYPE,
                    Email.CONTENT_ITEM_TYPE)
            .withValue(
                    ContactsContract.CommonDataKinds.Email.DATA,
                    "priyankay27@gmail.com")
            .withValue(
                    ContactsContract.CommonDataKinds.Email.DISPLAY_NAME,
                    "priyanka")
            .withValue(
                    ContactsContract.CommonDataKinds.Email.TYPE,
                    ContactsContract.CommonDataKinds.Email.TYPE_WORK)
            .build());

    getContentResolver().applyBatch(
            ContactsContract.AUTHORITY, ops);

    Context ctx = getApplicationContext();
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(ctx,
            "Update successful", duration);
    toast.show();

    Logger.debug("Update successful");

This updates display name as "priyanka 2" instead of "priyanka" as you seen 2 get appended after display name.