Flow text automatically on multiple boxes adding pages only the first time

hello, i need to make something like this for multiple pages:

i have 3 colums in excel with many lines of text. i need to automatically create copies of the page, and every page should have only one line of text after another.

i create a page master with 3 boxes and add the first column of text to the first and only page i have. other pages get created automatically as expected.

the problem is: when i paste the other 2 columns, i get every time new pages with only that content, but i need them to overlap,

so page 1 should have

name1

code1

123

page 2 should have

name 2

code2

456

etc

instead i got all tre rows separated in different pages.

i'm reading here but i do not understand how to make it work, and/or, if it is the right place to look at.

Thread text among frames in Adobe InDesign