{UNKNOWN}: DBI Exception: DBD::mysql::db do failed: Cannot change column 'category': used in a foreign key constraint 'koha_ebeteca/items_search_fields_authorised_values_category' of table 'koha_ebeteca/items_search_fields'  at /usr/share/perl5/DBIx/Class/Schema.pm line 1118.

        DBIx::Class::Schema::throw_exception(Koha::Schema=HASH(0x5620ec37ab58), "DBI Exception: DBD::mysql::db do failed: Cannot change column"...) called at /usr/share/perl5/DBIx/Class/Storage.pm line 113

        DBIx::Class::Storage::throw_exception(DBIx::Class::Storage::DBI::mysql=HASH(0x5620f187ab18), "DBI Exception: DBD::mysql::db do failed: Cannot change column"...) called at /usr/share/perl5/DBIx/Class/Storage/DBI.pm line 1623

        DBIx::Class::Storage::DBI::__ANON__("DBD::mysql::db do failed: Cannot change column 'category': us"..., DBI::db=HASH(0x5620f2141938), undef) called at /usr/share/koha/intranet/cgi-bin/installer/data/mysql/updatedatabase.pl line 9704