during first web run of cron after fresh 2.0.2 install (after some mbz course restores and a borked restore (Films from mooch), which shouldn't have anything to do with this.)

Running clean-up tasks...
Deleted old cache_text records
checking for create_password
!!! Error reading from database !!!
!! ERROR: column "co.id" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: SELECT ta.tagid, tb.tagid AS correlation, co.id AS correlati...
^
SELECT ta.tagid, tb.tagid AS correlation, co.id AS correlationid, co.correlatedtags
FROM mdl_tag_instance ta
LEFT JOIN mdl_tag_instance tb
ON (ta.itemtype = tb.itemtype AND ta.itemid = tb.itemid AND ta.tagid <> tb.tagid)
LEFT JOIN mdl_tag_correlation co
ON co.tagid = ta.tagid
WHERE tb.tagid IS NOT NULL
GROUP BY ta.tagid, tb.tagid
HAVING COUNT > $1
ORDER BY ta.tagid ASC, COUNT DESC, tb.tagid ASC
[array (
0 => 2,
)] !!
!! Stack trace: * line 391 of /lib/dml/moodle_database.php: dml_read_exception thrown

• line 232 of /lib/dml/pgsql_native_moodle_database.php: call to moodle_database->query_end()
• line 634 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->query_end()
• line 844 of /tag/lib.php: call to pgsql_native_moodle_database->get_recordset_sql()
• line 910 of /tag/lib.php: call to tag_compute_correlations()
• line 310 of /lib/cronlib.php: call to tag_cron()
• line 79 of /admin/cron.php: call to cron_run()
  !!