MS Excel Text to Columns Warning: There's already data here. Do you want to replace it?

[kjs55]

Running PVsyst v7.4.2

Generate 8760 CSV output file using default settings.

Open 8760 CSV output file in Microsoft MS Excel.

Highlight first column (Column A).

Data tab > Text to columns > Delimited > Next > Semicolon > Finish

Warning: There's already data here. Do you want to replace it?

Because there's some data in columns B and C.

I don't think there should be data in any column except for Column A.

Thanks.