Also read the reply next to it to see the chances for it to happen.
Perhaps I didn't made it clear that the next button isn't necessarily means that the wallet was previously created by someone.
As I've said, it just means that it came out to be a valid seed phrase.
Even a seed phrase like "banana banana banana banana aaaaaaaaaaaaaa........", may produce a valid seed phrase until it produces a valid version number,
Somewhere in the nth letter a. (spoiler: 104th don't use it) It's a valid seed but it's not owned by anyone.
Another thing is, Electurm is confirgured to generate its seed phrase using the wordlist in its source code which is the same as BIP39's.
So a mnemonic that consist of 4 words and a letter can't be a seed phrase once generated by Electrum by another user.