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Additional Info - Locale must exist but it already exists?

I don't know why it is giving this warning, I have already filled the data.
Edit:
I'm trying to update the script.

Choose the locale below:

I'm updating the script. There's no option for automatic detection.

But it was working until yesterday when I made the previous update. Can it be debugged by today?

I can debug it by yesterday!

You mean tomorrow?