After installing the old database, log in to the staff client. You should get the 'web installer', not the Home page. Koha will detect that the DB needs to be upgraded and will do so. That's a pretty big upgrade. When its done, a lot of your reports might need repair. If so, you'll get a warning on your 'saved reports' page.
Also examine the About page System Information tab and note any warnings.
Bob Birchall

On 12/02/18 23:16, Igbudu Tersoo wrote:
I have installed koha 17.11 successfully. i am trying to restore data from
an old version (Koha 3.18) . after dropping the new database and restoring
the old one. i tried to upgrade the database schema using

*koha-upgrade-schema library, then it gives this error on command line:*Use
of uninitialized value in numeric lt (<) at
line 5531.
Failed to add reserve_id to reserves tables, please refresh the page to try
again. at /usr/share/koha/intranet/cgi-bin/installer/data/mysql/ line 5591.

please what can i do?
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