Added check for missing DB data

- this check should never really be hit unless the DB has missing data,
  but the code tries to read from an undefined variable and crashes, which we
  can protect against
- this can be triggered by doing a `knex-migrator init` followed by a
  `knex-migrator rollback --v 3.0 --force`

core/server/data/migrations/versions/3.22/07-update-type-for-settings.js

@@ -118,6 +118,12 @@ module.exports = {
                     .transacting('settings')
                     .where('key', key)
                     .select('group');
+
+                if (groupResult.length === 0) {
+                    logging.warn(`Could not find group not found for ${key}`);
+                    return;
+                }
+
                 const groupValue = groupResult[0].group;
                 return await options
                     .transacting('settings')