Trouble creating device packages

Hello everyone, I'm new to this forum but here is my question.

I am charged with deploying our 400 (100, 100, and 200) device licenses of Creative Cloud

I log into the Creative Cloud Packager using the bottom option (Creative Cloud desktop apps for Education)

but when faced at the license settings I have two options:

Serial Number License

Named License

All three of my licenses are for 100 or 200 devices . I dont have options to add named users since it not that type of license.

I didnt recieve a serial number for each of my licenses but I not sure how to proceed. I found a single older key in LWS for creative cloud but not for my current licenses.