Hi, Rafael Francisco1
Thank you for using Microsoft products and posting them to the community.
This is a limitation of personal accounts. You can only create one workspace per account. If you want to create a new workspace, you can only delete the old one and then create a new one.
There is no such limit for work accounts, but the number of accounts that can be created (that is, the creation limit) will also be limited by IT and organizers.
I hope the above information can help you. Feel free to send a message if you need further help.
Best wishes
Aiden.C - MSFT |Microsoft Community Support Specialist