HELP: Content creator project - No solution provided?

Hi, for the content creator project, I just can’t understand the solution provided.

link to the project: https://www.codecademy.com/paths/create-a-back-end-app-with-javascript/tracks/bapi-javascript-conditionals-and-functions/modules/developing-javascript-apps-locally/informationals/bapi-p0-content-creators

link to the solution: https://www.codecademy.com/paths/create-a-back-end-app-with-javascript/tracks/bapi-javascript-conditionals-and-functions/modules/developing-javascript-apps-locally/informationals/content-creators-contracting-solution

I don’t see any change in the code provided… I should be missing on something I guess.

Can someone help me with that one as it has been 2 days that I have been trying to understand…

Thank you in advance!