jsocialintegration_og_tags_for_k2

go to components/com_k2/views/item/view.html.php page in your site and comment lines 551 to 565 as follows -
/*
$document->setMetaData('og:url', $uri->toString());
		$document->setMetaData('og:title', (K2_JVERSION == '15') ? htmlspecialchars($document->getTitle(), ENT_QUOTES, 'UTF-8') : $document->getTitle());
		$document->setMetaData('og:type', 'article');
		$facebookImage = 'image'.$params->get('facebookImage', 'Small');
		if ($item->$facebookImage)
		{
			$parts = parse_url($item->$facebookImage);
			if (JFile::exists(JPATH_SITE.$parts['path']))
			{
				$image = substr(JURI::root(), 0, -1).str_replace(JURI::root(true), '', $item->$facebookImage);
				$document->setMetaData('og:image', $image);
				$document->setMetaData('image', $image);
			}
		}
		$document->setMetaData('og:description', strip_tags($document->getDescription()));
*/
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go to components/com_k2/views/itemlist/view.html.php page in your site and comment lines 700 to 709 as follows -
/*
$document->setMetaData('og:url', $uri->toString());
		$document->setMetaData('og:title', (K2_JVERSION == '15') ? htmlspecialchars($document->getTitle(), ENT_QUOTES, 'UTF-8') : $document->getTitle());
		$document->setMetaData('og:type', 'website');
		if ($task == 'category' && $this->category->image && strpos($this->category->image, 'placeholder/category.png') === false)
		{
			$image = substr(JURI::root(), 0, -1).str_replace(JURI::root(true), '', $this->category->image);
			$document->setMetaData('og:image', $image);
			$document->setMetaData('image', $image);
		}
		$document->setMetaData('og:description', strip_tags($document->getDescription()));
*/
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go to components/com_k2/views/latest/view.html.php page in your site and comment lines 274 to 277 as follows -
/*
$document->setMetaData('og:url', $uri->toString());
        $document->setMetaData('og:title', (K2_JVERSION == '15') ? htmlspecialchars($document->getTitle(), ENT_QUOTES, 'UTF-8') : $document->getTitle());
        $document->setMetaData('og:type', 'website');
        $document->setMetaData('og:description', strip_tags($document->getDescription()));
*/