I think it really depends to be honest on the field and the conference. In social sciences, at least at the conferences I've been to or colleagues promoting our work, the same paper has been presented multiple times.
To give an example, my colleague is currently presenting our work at a few difference conferences, each a different but intersecting field but it's essentially the same paper with a few tweaks but to a different audience, and that can be really helpful in getting work out and making new connections.
There's like an unspoken rule that you shouldn't but considering conferences are really about getting your work out and letting people know who you are and what you do, I personally don't see an issue in seeing the same paper presented at multiple places, or a series that are very similar.