NULL values in database queries

There seems to be an issue with the migration part of the new 3.0.0 updated. We are seeing this issue across many sites and servers.

When the update happens, it is calling:

PrliUtils->migrate_after_db_upgrade()

This then calls:

$cpt_id = $prli_link->create_cpt_for_link($link->name, $link->created_at, $link->updated_at);

The problem is that at least in our examples, every entry in the wp_prli_links table has an updated_at value of NULL. The create_cpt_for_link function then tries to do a direct insert to the wp_posts table except the values for post_modified and post_modified_gmt respectively come out like so:

NULL, '1970-01-01 00:00:00'

This is not allowed by the wp_posts table schema:

WordPress database error Column 'post_modified' cannot be null for query...

This causes a lot of spam in error logs (in fact we’ve seen it creating 10+GB of error logs quite easily) and also causes load on the database. It then seems to keep trying every 30 minutes due to the transient you have to retry installations.

A fix for this problem ASAP would be very useful.