@ketankoranne,
Thanks. I’ll mark the topic as resolved.
I’ll give a response to your additional question. If you need a follow up, then please start a new topic.
My assumption is that you have previously loaded one or more documents and their different versions as Attachments and can you simply link them together as Documents.
If that is your scenario, then there is no provided method to do this. You should do it one Document (and its modifications) at a time. For this, you need to download them to your client, then create a Document with the Oldest modification and save it. Then update it with the next oldest modification and save that. Repeat the process until you get to the current version of the Document.
You may be able to then delete the original Attachment records from the system (to save space). However, the question is, are the Attachment records linked to Pages or Posts? If so, you would need to link to the Document (or one of its Revisions).
Hope this is of use,
Neil James