I'm using Moodle 3.7.4 and latest Questionnaire version. I've checked the database schema (admin/cli/check_database_schema.php) and found several errors related to Questionnaire plugin (updated several times from years).
I suspect there's a coherence problem between files db/upgrade.php and db/install.xml.
You can find more information/details in the discussion https://moodle.org/mod/forum/discuss.php?d=397356 i created previously.
Do you think you can make something to correct this in a future version?
Thanks in advance,