[wahnfrieden]

it's not grammatically correct but reflects a pausing speaking style to avoid confusion generated from repeating the same word twice in a row, and also to emphasize the repetition (a thing becoming more of a thing after already being that thing). (others are telling you whether it's correct per textbook rules or that it's purely stylistic but not why it's used in practice and what it conveys)

[alabastervlog]

There are “close” and “open” styles of comma usage. “Open” has been ascendant for the last few decades (it began to rise in the early 20th century, but wasn’t firmly dominant until later). It’s less precise and expressive, but “cleaner”.

Source: Garner’s.