manual update of values in items table

[joosep]

Hi, I wanted to ask if there might be any issues with Zabbix if I manually update the items.history column values in database.
We have at the moment more than 45K items where history='90d' and I need to set them to '30d'.
My idea is to run this:

begin;
update items set history = '30d' where history = '90d';
commit;

Has anyone done this kind of thing and lived to tell the tale?

Database = postgres
Zabbix version = 3.4.15

[joosep]

So should someone else have this question - after running some tests and then doing the actual updates in prod these kind of updates seem to be safe and have no ill side-effect.