https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=29631 --- Comment #18 from Manos PETRIDIS <egpetridis@yahoo.com> --- As mine was one of the installations affected by this bug, I can verify that after running the following statements, web istaller completed successfully. DELETE a FROM language_subtag_registry AS a, language_subtag_registry AS b WHERE a.id < b.id AND a.subtag IS NOT NULL AND a.subtag=b.subtag AND a.type=b.type; DELETE a FROM language_descriptions AS a, language_descriptions AS b WHERE a.id < b.id AND a.subtag IS NOT NULL AND a.subtag=b.subtag AND a.lang IS NOT NULL AND a.lang=b.lang AND a.type=b.type; DELETE a FROM language_rfc4646_to_iso639 AS a, language_rfc4646_to_iso639 AS b WHERE a.id < b.id AND a.rfc4646_subtag IS NOT NULL AND a.rfc4646_subtag=b.rfc4646_subtag AND a.iso639_2_code=b.iso639_2_code; Thank you all for your help in resolving this issue. Manos Petridis -- You are receiving this mail because: You are watching all bug changes.