Odd Print error

Hi All,
does anyone know how to fix this! it has suddenly starting doing it and i have tried everything i can think of.
This only does it on my ender 3 v3 se ( about 3months old)
I have a V3 KE ( about a month old) and it doesnt do it on that.
It is in the same place every time, and the rest of the print is perfect.

I had similar on a print on my Ender 5 plus running PETG, slower print speed sort of fixed it.

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