$productCollection = $this->getProductsByItemNo($itemNo);

 if ($productCollection->getTotalCount() > 0) {
    foreach ($productCollection->getItems() as $product) {
        /** @var ProductInterface $product */
        if ($priceType == 1) {
            //set content update for this date
            if (!empty($priceAttributes['StartingDate'])) {
                $startDt = Datetime::createFromFormat('Y-m-d', $priceAttributes['StartingDate']);
                $nowDt = new Datetime();

                if ($startDt stagingUpdateFactory->create();

                if ($startDt > $nowDt) {
                    $stagingUpdate->setStartTime($startDt->format('Y-m-d H:i:s'));
                }

                if (!empty($priceAttributes['EndingDate'])) {
                    $endDt = Datetime::createFromFormat('Y-m-d', $priceAttributes['EndingDate']);
                    $stagingUpdate->setEndTime($endDt->format('Y-m-d H:i:s'));
                }

                $stagingUpdate = $this->stagingUpdateRepository->save($stagingUpdate);
                $this->versionManager->setCurrentVersionId($stagingUpdate->getId());
                $product->setSpecialPrice($priceAttributes['UnitPrice']);
                $this->productStaging->schedule($product, $stagingUpdate->getId());
            }
        }
    }
}

->unsetData('media_gallery');