If you create an object or information in the future, and then take it to the past, when did it get created? It cant exist in the past if it was made in the future
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That’s not how time travel works though. If you were to go back in time to save someone then they wouldn’t exist/have been saved in your current present. You cant change your current present in the past, you can only create an alternative future. A different timeline.
That's a possible solution to the paradox, we dont know how it actually works or whether it's possible. Another solution would be that the timelines become an infinite loop where you going to the past triggers something that becomesthe reason you go to the past in the first place