I was running Piefed, but switched it to Lemmy after a while, it’s done through the same domain. I am running a Fediverse server through a Cloudflare tunnel, had some major de-sync issues with Lemmy.world, and a new account seemingly resolved them. I am not sure if all is working well or not. My terminal is spamming me with inbox post requests to lemmy.world and I am unsure if this is normal or not.
Using the same domain and swapping software is glitchy. We swapped from Lemmy to PieFed about a year ago and some things never worked right. Old comms wouldn’t update due to different IDs on other instances etc. it’s mostly resolved, took some time for some instances to clear their old history of us and what not. c/sighfi never recovered and had to be remade as c/sigh_fi.
The new account might have solved them by simply being a new account with no known data on other instances. Did the other one have the same username as your PF instance had?
Yes, Cantaloupe877 was made on both instances, using the same domain. After moving to Lemmy, several weird things started happening like me not being able to join communities, profile pictures not loading, and my posts not showing up on lemmy. I thought I configured the server wrong so I screwed about with it to no avail, but I discovered with further testing that other servers worked fine, I could join their communities and post fine, and I realized my mistake.
The only thing that remains broken that I am aware of is my profile picture. When that’ll fix itself or if ever, no idea, but it’s working pretty well now aside from that.
Your instance would have private/public keys for communicating with other instances. By changing software, all that is gone, and you might find other instances rejecting your federation activities, this is doubly true if you used the same username, because they would already have a record of that user with a different public key.
I’d suggest using a subdomain or a new domain, re-using a domain for a different Fediverse server is likely to have issues. A subdomain would be treated as a different domain so would be fine.
This is also something to know for a different scenario: taking your lemmy instance and changing the domain but keeping the content is likely to break federation as well.
I’m gonna try and hold out and see what happens. Piefed did not last long, it did federate with quite a few servers, but I was mainly browsing content on my one account.