mysql> use koha_bibliogam;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> SET foreign_key_checks = 0;
Query OK, 0 rows affected (0.00 sec)

mysql> delete from  auth_header;
Query OK, 5323 rows affected (0.05 sec)

mysql> delete from  import_auths;
Query OK, 5323 rows affected (0.05 sec)

mysql> SET foreign_key_checks = 1;
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql>
mysql> exit
Bye
root@koha:~# koha-rebuild-zebra  -v -d -a -x bibliogam
Zebra configuration information
================================
Zebra biblio directory      = /var/lib/koha/bibliogam/biblios
Zebra authorities directory = /var/lib/koha/bibliogam/authorities
Koha directory              = /usr/share/koha/intranet/cgi-bin
Lockfile                    = /var/lock/koha/bibliogam/rebuild/rebuild..LCK
BIBLIONUMBER in :     999$c
BIBLIOITEMNUMBER in : 999$d
================================
====================
exporting authority
====================

Records exported: 0

Records exported: 0
====================
REINDEXING zebra
====================
skipping biblios
====================
CLEANING
====================
root@koha:~#