19.10 upgrade is failing at artefact_plans_plan

Upgrading from 19.04 to 19.10 is failing during DB upgrade at table 'artefact_plans_plan':

[WAR] c7 (lib/dml.php:540) Failed to get a recordset: postgres8 error: [-18: ERROR: relation "artefact_plans_plan" does not exist
[WAR] c7 (lib/dml.php:540) LINE 1: SELECT * FROM "artefact_plans_plan" WHERE "artefact" = $1 ...
[WAR] c7 (lib/dml.php:540) ^] in adodb_throw(SELECT * FROM "artefact_plans_plan" WHERE "artefact" = ? LIMIT 2, Array)Command was: SELECT * FROM "artefact_plans_plan" WHERE "artefact" = ? and values was (0:282)
Call stack (most recent first):
  * get_recordset_sql(string(size 58), array(size 1), integer, integer) at /var/www/copy-welcome-prod-mahara/releases/20191103221101/lib/dml.php:359
  * get_record_sql(string(size 58), array(size 1), integer) at /var/www/copy-welcome-prod-mahara/releases/20191103221101/lib/dml.php:328
  * get_record(string(size 19), string(size 8), string(size 3)) at /var/www/copy-welcome-prod-mahara/releases/20191103221101/artefact/plans/lib.php:210

This is due to the upgrade being out of synch in the creation of the artefact_plans_plan table:
/artefact/plans/db/upgrade.php:

    if ($oldversion < 2019071700) {
        $table = new XMLDBTable('artefact_plans_plan');
...

and lib/db/upgrade.php:

    if ($oldversion < 2019040900) {
        log_debug('Updating plan blocktype in view version');
...

 and trying to read from that table.