All social media management platforms including no longer support duplicate posts. Due to restrictions imposed by Twitter, in order to reduce spam, posts need to have enough variation in order to not trigger the spam filter.
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If you try and publish or schedule a post with identical content to one you’ve already published, you’ll get a message that says you have to change it. You won’t be able to publish or schedule the duplicate post. We want to make sure our users aren’t blocked on Twitter, after all!

Take a look at our Twitter best practices to learn more about writing content for Twitter.