f-puzzles link: https://f-puzzles.com/?id=y6ygquqv
Solution code: Row 5 followed by row 8 with no spaces in between (ie 123456789123456789)
on 18. September 2020, 21:26 by JoJoMcFroYo
Yes, the only function of that cage is it tells you that there has to be a repeated digit somewhere in it.
on 18. September 2020, 20:08 by rlg
One of the cages in box 2 does not have a sum digit; does it still require repeated digits?
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