Masters in Masters tab in Font Info labelled "Italic"

How do you do this? I noticed on a Glyphs app file generated in FontLab, the master says it’s an Italic — it had an angle of 540° for some reason even though it’s upright, I set it to 0° but it still is labelled Italic

Does the ‘italic’ stays in the name if you reopen the file?

It went away