Copy/paste to overwrite column settings

Hello !
I’m having problems with a table behaving strangely when copying and pasting.
I’ve created a table (see attachment) with “multiple choice” fields.
Then I copy data from Excel into these fields. Everything works fine except for 1 column where the copy overwrites the column settings and turns it into a “plain text” column…
Any idea what’s wrong?
PS: I removed all cell formatting in Excel before copying and pasting.

Translated with (free version)

Your attachment didn’t come through — it might not let you upload attachments because you’re a newer user, but maybe try again.