Fatal error after WooCommerce database update

We updated WP and got the message to update WooCommerce DB now. But our recent DB update created a fatal error in backend:

Uncaught WC_Data_Exception: Die Eigenschaft des Aktions-Labels für
Admin-Notiz darf nicht leer sein. in
/home/httpd/vhosts/flywithus.ch/fwu-newstore-wp/wp-content/plugins/woocomm
erce/includes/abstracts/abstract-wc-data.php:810 Stack trace: #0
/home/httpd/vhosts/flywithus.ch/fwu-newstore-wp/wp-content/plugins/woocomm
erce/packages/woocommerce-admin/src/Notes/WC_Admin_Note.php(516):
WC_Data->error(‘admin_note_inva…’, ‘Die Eigenschaft…’) #1
/home/httpd/vhosts/flywithus.ch/fwu-newstore-wp/wp-content/plugins/woocomm
erce/includes/admin/notes/class-wc-notes-run-db-update.php(220):
Automattic\WooCommerce\Admin\Notes\WC_Admin_Note->add_action(‘update-db
_done’, ”, ‘https://flywith…’, ‘actioned’, true) #2
/home/httpd/vhosts/flywithus.ch/fwu-newstore-wp/wp-content/plugins/woocomm
erce/includes/admin/notes/class-wc-notes-run-db-update.php(290):
WC_Notes_Run_Db_Update::update_done_notice(‘3’) #3
/home/httpd/vhosts/flywithus.ch/fwu-newstore-wp/wp-includes/class-wp-hook.
php(288): WC_Notes_Run_Db_Update::show_reminder(O in
/home/httpd/vhosts/flywithus.ch/fwu-newstore-wp/wp-content/plugins/woocomm
erce/includes/abstracts/abstract-wc-data.php on line 810

Any idea how to solve this?

Thanks!
Thomas