This one has been coming up a lot at work recently ( yeh, I am a programmer ) :

重複

ちょうふく

choufuku

And it means “duplicate”

I have seen it being used with “suru” so I guess what you say, for example, is  “the data is duplicating”
データが重複している。

でーたがちょうふくしている。

de-ta ga choufuku shiteiru.

There is some duplicate data