Default TTL value in DynamoDB when adding to an existing table?

Question

Amazon Web Services

I need to add a TTL to an existing DynamoDB table, which of course is not empty.
And at this stage, I had a question: what will be the TTL in the already existing database elements?
I did not find a clear answer to this question, but on similar questions I found information that the TTL will be empty and such data will not be deleted.
And so I would like to get a clear answer, otherwise I don’t want to lose data from the database inadvertently.

Answer 1

So it's very difficult to read the official documentation ?)

Items with no TTL attribute, or with an expiration time more than 5 years in the past, are not deleted.

Just a reminder that DynamoDB is not a table storage, but key-value storage, and old records will not have a new field until the records are forcefully updated with this field