PHP 8.1.9 Fatal error on saving changes in Discussion/Media settings

I am testing HyperDB with a fresh install of WordPress 6.0.2 on Apache+php 8.1.9. Clicking "Save Changes" on the Discussion/Media Settings pages in the dashboard returns the critical error notice page. This occurs even if no options were selected to be changed. The other settings pages don't return this error.

Log for Discussion Settings:
```
AH01071: Got error 'PHP message: PHP Fatal error: Uncaught mysqli_sql_exception: Column 'option_value' cannot be null in /www/wp-content/db.php:1404
Stack trace:
#0 /www/wp-content/db.php(1404): mysqli_query()
#1 /www/wp-content/db.php(942): hyperdb->ex_mysql_query()
#2 /www/wp-includes/wp-db.php(2476): hyperdb->query()
#3 /www/wp-includes/option.php(496): wpdb->update()
#4 /www/wp-admin/options.php(322): update_option()
#5 {main}
thrown in /www/wp-content/db.php on line 1404', referer: https://host.url/wp-admin/options-discussion.php
```
Log for Media Settings:
```
AH01071: Got error 'PHP message: PHP Fatal error: Uncaught mysqli_sql_exception: Column 'option_value' cannot be null in /www/wp-content/db.php:1404
Stack trace:
#0 /www/wp-content/db.php(1404): mysqli_query()
#1 /www/wp-content/db.php(942): hyperdb->ex_mysql_query()
#2 /www/wp-includes/wp-db.php(2476): hyperdb->query()
#3 /www/wp-includes/option.php(496): wpdb->update()
#4 /www/wp-admin/options.php(322): update_option()
#5 {main}
thrown in /www/wp-content/db.php on line 1404', referer: https://host.url/wp-admin/options-media.php
```