Hello, first you should make sure that to import the .flf file into the SQL Server database rather than just loading it for your active session. If you uploaded the license using the Web Client or the Dynamics NAV Administration Shell, the new object range will not be recognized until you restart the Microsoft Dynamics NAV Server instance using the Restart-NAVServerInstance PowerShell cmdlet.
If the issue persists after the service restart, you should verify that the license actually contains the newly purchased table objects by opening the License Permission table within the development environment to check your allowed object ID boundaries.