[Koha] error in rebuild zebra -

[Vikas Salunkhe]

Dear all
i try to rebuild zebra i use following command  to solve problem
Availability: No items available: in opac

root at vikas:~# sudo KOHA_CONF=/etc/koha/koha-conf.xml
PERL5LIB=/usr/share/koha/lib /usr/share/koha/bin/migration_tools/
rebuild_zebra.pl -b -r -v
Zebra configuration information
================================
Zebra biblio directory      = /var/lib/koha/zebradb/biblios
Zebra authorities directory = /var/lib/koha/zebradb/authorities
Koha directory              = /usr/share/koha/intranet/cgi-bin
BIBLIONUMBER in :     999$c
BIBLIOITEMNUMBER in : 999$d
================================
skipping authorities
====================
exporting biblio
====================
1...............................................................................101.............................................................................201.............................................................................301.............................................................................401.............................................................................501....................
Records exported: 519
====================
REINDEXING zebra
====================
10:27:42-23/08 zebraidx(2763) [warn] Unknown register type:
====================
CLEANING


Please guide  how to solve the error 10:27:42-23/08 zebraidx(2763) [warn]
Unknown register type: and remove the error Availability: No items
available: in opac


Vikas Salunkhe