[Koha] Error restoring Koha-Instance

[Beda Szukics]

Hi all

I try to restore a koha-instance wiht koha-restore and I get the
following messages:

error retrieving biblio 1669 at
/usr/share/koha/bin/migration_tools/rebuild_zebra.pl line 680.
DBD::mysql::st execute failed: Unknown column 'me.damaged_on' in 'field
list' [for Statement "SELECT `me`.`itemnumber`, `me`.`biblionumber`,
`me`.`biblioitemnumber`, `me`.`barcode`, `me`.`dateaccessioned`,
`me`.`booksellerid`, `me`.`homebranch`, `me`.`price`,
`me`.`replacementprice`, `me`.`replacementpricedate`,
`me`.`datelastborrowed`, `me`.`datelastseen`, `me`.`stack`,
`me`.`notforloan`, `me`.`damaged`, `me`.`damaged_on`, `me`.`itemlost`,
`me`.`itemlost_on`, `me`.`withdrawn`, `me`.`withdrawn_on`,
`me`.`itemcallnumber`, `me`.`coded_location_qualifier`, `me`.`issues`,
`me`.`renewals`, `me`.`reserves`, `me`.`restricted`, `me`.`itemnotes`,
`me`.`itemnotes_nonpublic`, `me`.`holdingbranch`, `me`.`paidfor`,
`me`.`timestamp`, `me`.`location`, `me`.`permanent_location`,
`me`.`onloan`, `me`.`cn_source`, `me`.`cn_sort`, `me`.`ccode`,
`me`.`materials`, `me`.`uri`, `me`.`itype`, `me`.`more_subfields_xml`,
`me`.`enumchron`, `me`.`copynumber`, `me`.`stocknumber`,
`me`.`new_status` FROM `items` `me` WHERE ( `me`.`itemnumber` = ? )"
with ParamValues: 0=2262] at /usr/share/perl5/DBIx/Class/Storage/DBI.pm
line 1836.

Maybe my dump is too old? The one I have is from Juni 2018. Koha is
18.11.02.000.

It shows:
System Maintenance

The Koha online catalog is offline for system maintenance. We'll be back
soon! If you have any questions, please contact the site administrator

What can I do?

Beda