u/Kakkakimpale225

Hello, I am asking for help since I have never played on Nintendo myself. Today, I bought my little sister Animal Crossing Nintendo Switch 2 edition. She has switch 1 but the employees at the game store said that the game would work perfectly fine on switch 1. However, when she tried to play the game it was apparently very laggy and she couldn't even save. I tried to look up the problem but it seems like the most common reason for lag is a heavily decorated island which is not a problem since my sister started playing today. Is the lag due to the fact I bought the wrong version? How do I fix this? Please help if you don't mind :(

Apologies for bad English. Not my first language.