Hi @Olaf.Rabbachin,
I tried @ale_c 's solution using my second account. Changing the username was easy (and had no effect on my learning history) but when I refreshed my forum account there were a couple of anomalies. When I hovered over my avatar (top right corner), it displayed a corrupted version of the old username. When I opened my forum summary page, it displayed the new username correctly but also showed the corrupted version of the old username underneath.
Both the old and new usernames include one ‘underscore’ special character, so that may be having some effect on the outcome. I’ll take another look later when I have more time.
