Would it be possible that you want to recreate the database tables of the News app, because columns are missing? Please make sure that all app related data have been removed on uninstall from the Nextcloud database BEFORE reinstalling the app.
This posting describes what need to be done to clean-up the database if e.g. the Mail app has been removed. It should be an easy task to adapt the steps for the news app. Please make sure that you’re creating a database backup before you modify any data: