RE: Dynamics Business Central developing license
Hello,
For upgrades, you always need to upload a Microsoft Business Central Partner ( Developer ) license to convert the DB ( database) .
Microsoft partner licenses are far more powerful than customer licenses, always been like this.
Please, review Microsoft docs
docs.microsoft.com/.../converting-a-database
Upload the Business Central Partner license to the database.
For more information, see Uploading a License File for a Specific Database.
Important > The license that you upload must be a developer license. During the conversion, the development environment will convert the report objects that are stored in the old database.