Double posting isn't normally a problem. It's a fairly flexible rule if there's a legitimate purpose for it.
I'm not sure why it would be deleted but I don't think we can do anything about it here, maybe you could try contacting the owner of that thread to ask why it was deleted if you haven't already. What language was it in and what thread?
I do not think the owner of the thread deleted the post. He is not active for the last two days. But the post was deleted hours ago. So, it was deleted by a global moderator or Cyrus. The language is Bengali. I do not know what's the wrong was. Nees an answer from the moderator who deleted.
I would re-post it personally and just preface the post explaining what it is and where you took it from.
I had changed the title, had shared link to the original post. Since no mistake from me, I do not think it will be wise to repost.