Deva Ju is a feeling of re-experiencing an event or place where you have been before, but we miss the most important factor here, that is its connection with Law of Attraction. But, to see how this works you need clear your mind and be ready for acceptance of what universe what's you to know. All you need to do is just re-boot your mind and think fresh.
Though there is no official or shall I say scientifically acclaimed explanation of this phenomenon, it is still very much possible that it just means that this situation, which could be any place or event, that you feel is repeating itself, is somehow significant for you.
The Universe is making you stop and think about it for a reason. Drawing your attention to a specific moment in time. Something that otherwise you wouldn’t have noticed at all. It is a definitely a sign.