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Our site is a multilingual , and its our structure for different lang : for en :domain.com/myPost for Arabic : domain.com/ar/myPost and most of the page and post in main site , have Arabic version also. and we want to generate href lang tag for all pages and posts.(for both language) and its my problem ; if i have a post or page in main site( English ), but the Arabic  version not published yet and the href lang in English site pointed to the arabic url page (the page that doesn't exist yet) {arabic version almost will publish after 4-5 days } is it harmful for our SEO ? that href lang point to the URL that doesnt exist?