When debugging the /libraries/src/table/table.php file which has been reworked in joomla 4 and which is called by Seblod's helper_version.php
Catches an error in line 847 which corresponds to a lack of default value in the database.
With admin or phpadmin it's necessary to add in this database an empty default value to the column 'note' otherwise no backup.
Do not forget to fill in the choice of backup in the integration of Seblod.
Hope this helps you.
Regards