Problem with Group Loop (Start)

Hi everyone, I would really appreciate some help because I’m struggling terribly with the Group Loop Start node.

I’m building a model where I’m trying to understand which variables play a role in the result of the number of orders in a given month on my e-shop. I have prepared data where each row contains the month (a timeline in year-month-day format) and the resulting number of orders (the desired result of the equation). I’ve read that apparently the best way to figure out why a certain number of orders occurred in individual months is to run this dataset through the Group Loop Start node. However, when I do this, the result pours into one single row instead of the original 24 rows (I have 24 consecutive months). After that, the Linear Regression doesn’t want to work with it anymore. Do you have any ideas on how to prevent this from happening so that the result isn’t just a single row but a separate row for each month, so I can figure out the answer to the question, “what influences the sales the most in October/November/December?”.