Hi Friends I was testing koha (on ubuntu 20.04) upgrade from 21.05 throws an error as mentioned below. Kindly advise me, should i downgrade the koha. I have a backup of the database on koha 21.05. Your insights would be appreciated. Atomic updates: - DEV atomic update /usr/share/koha/intranet/cgi-bin/installer/data/mysql/atomicupdate/ bug_29596.pl [11:31:16]: Bug 29596 - Add Yiddish language Update errors : - Upgrade to 21.11.02.003 [11:31:16]: Bug 29605 - Resync DB structure for existing installations ERROR: {UNKNOWN}: DBI Exception: DBD::mysql::db do failed: Duplicate entry 'ar' for key 'PRIMARY' at /usr/share/koha/lib/C4/Installer.pm line 738 Thanks ______________________________________ *Dr. Yesan Sellan, * *MLISc., PGDLAN, BCS., UGC-NET., PhD* *Strategic | Learner | Achiever | Responsibility | Intellection* *Chief Librarian* South Asia Institute of Advanced Christian Studies (SAIACS) 363 Dodda Gubbi Cross Road, Kothanur P.O., Bangalore 77, India Phone: 91 80 2846 5235/5344/ 5649, Fax: 91 80 28465412, Mobile: 91-9972348251 www.saiacs.org Alternative Email: yesans@gmail.com https://orcid.org/0000-0002-0501-5661 <yesans@gmail.com> ______________________________________ IMPORTANT : This message is intended only for the addressee. It may contain confidential information. Any unauthorized disclosure is strictly prohibited. If you have received this message in error, please notify us immediately so that we may correct our internal records. Please then delete the original message. Thank you. P Please consider the environment before printing this email*.*