The earlier CONTRIB plugin versions of the tool (<33.2.0, <34.2.0) were
missing the following columns in the data requests table:
* commentsformat
* dpocommentformat
And the upgrade scripts for the merged tool failed in
Moodle 3.3.8+/3.3.0+ failed to add these columns.
So a site which uses the CONTRIB plugin and eventually upgrading to 3.9
will encounter an error during upgrade because of the missing
dpocommentformat column.
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