Hi, I have just opened a sheet in work and this phenomenon has occured. Basically the data validation: list appears to be referencing a sheet that doesn't exist! My initial thought is that the original sheet name had been changed, but on trial the list seems to change reference. I've checked that the sheets aren't hidden, so I have no clue how this has happened!
It's not really an important issue as I have created a new list but I'd really like to know what's going on...
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