Good morning everyone.
I installed the watchos 5.3 beta profile on my apple watch 4. as it gave me problems I removed the profile from iphone and watch, but when I go to look for software updates don't install version 5.2.1. I also tried to initialize the watch, but nothing. how can I do to reinstall 5.2.1 firmware ? Thank you all.
It is not possible to downgrade watchOS, if you want to do that you must send your watch to Apple.