Hello,
For optimal functionality, we recommend leaving the permissions as they are. The Lansweeperuser is technically the only user that communicates with the database and requires these permissions to apply necessary updates in the database.
Upon the initial installation, it is the user specified in the setup steps that creates the database. But later when running updates, update scripts are executed by the scanning service, meaning Lansweeperuser. These update could require table updates, creation of tables etc. For these steps DBOwner will be required.