[Koha] Upgrade from Koha version 2.5 to 3.x

[Mark Tompsett]

Greetings,

Indranil's suggested process direction seems good.

Though, sometimes an upgrade is an opportunity to lose the junk.
However, perhaps you may wish to take this opportunity to do a fresh 
install, and import cleaned MARC records into the fresh install? I would 
also take note of any other settings which might be useful (custom reports, 
branches, system preference settings, etc.). There is, after all, multiple 
ways to accomplish the same thing. :)

GPML,
Mark Tompsett