Create script referred to in NAS 5.2 Postgresql installation documentation contains error

It seems that the scripts bundled with NAS release 5.2.2 release in scripts/sql/createHarvestDB.pgsql
have errors.
cf. https://sbforge.org/display/NASDOC52/Choose+an+Installation+Scenario#ChooseanInstallationScenario-PostgreSQLDatabase

The 'harvestdefinitions' table created has the wrong schemaversion '4'
Also the harvestchannel lacks a 'issnapshot' field

A workaround for this is the following

drop table harvestchannel;
delete from schemaversions where tablename='harvestchannel';
update schemaversions set version='3' where tablename='harvestdefinitions';
\q

The run update_external_harvest_database.sh again