[Koha] Database updates [IMPORTANT]

[Paul Poulain]

Hello everybody,

Some of you have reported that upgrades from 3.4 to 3.6 give warnings like
"duplicate key blabla"
or
"xxx already exist"

This is because the database update has a limit, and, if you update from
3.2 to 3.4, then 3.4 to 3.6, you'll do some updates twice, resulting in
a warning. We could have advertised this fact more, I agree.
But I confirm (I've checked, and Chris Cormack, the previous Release
Manager confirms as well) those warnings are harmless.

For 3.8, a new database update mechanism is underway, and this problem
should disappear.

In case you're running master (the developer version) and not a released
version (3.4.x or 3.6.x), be carefull: I made a mistake when pushing my
first patches with a wrong database revision numbering. I'll modify them
in a few hours, so you'll get an update, and an error (that will be
harmless too)
-- 
Paul POULAIN
Koha 3.8 Release Manager