I myself cannot explain it but there is a GrisshamDevian1 twitter
account I checked it and I don't exactly know the reason why it redirects to sameme's Twitter account since they do have a different username and I don't think you can have a custom link in Twitter especially a change in your username.
I wasn't sure either
[I rarely use Twitter] but after messing around with different parts of the links, it looks like GrisshamDevian, intentionally replaced/used sameme's status/tweet number so I doubt that it was the result of an accident.
Test
[combine the following and see for yourself]:
https://twitter.com/GrisshamDevian1 + status/1372739631846936581
[Elon Musk's latest tweet]https://twitter.com/GrisshamDevian1/status/1372739631846936581
Yes, it's missing a "1" at the end
[1454021].