我按照这些步骤成功重命名了重复的用户。但在尝试重新索引时，我遇到了这个问题。
@sam 在那个帖子中建议：“是的，请删除重复的行”，但我不清楚在重新索引时遇到的警告和错误信息的语境下该怎么做。现在问题已经演变成：
REINDEX SCHEMA CONCURRENTLY public;
WARNING: cannot reindex invalid index "public.index_incoming_referers_on_path_and_incoming_domain_id_ccnew" concurrently, skipping
WARNING: cannot reindex invalid index "public.incoming_referers_pkey_ccnew1" concurrently, skipping
WARNING: cannot reindex invalid index "public.index_incoming_referers_on_path_and_incoming_domain_id_ccnew1" concurrently, skipping
WARNING: cannot reindex invalid index "public.index_incoming_referers_on_path_and_incoming_domain_id_cc_ccnew" concurrently, skipping
WARNING: cannot reindex invalid index "public.index_incoming_referers_on_path_and_incoming_domain_id_c_ccnew1" concurrently, skipping
WARNING: cannot reindex invalid index "public.incoming_referers_pkey_ccnew2" concurrently, skipping
WARNING: cannot reindex invalid index "public.index_incoming_referers_on_path_and_incoming_domain_id_ccnew2" concurrently, skipping
WARNING: cannot reindex invalid index "public.incoming_referers_pkey_ccnew_ccnew" concurrently, skipping
WARNING: cannot reindex invalid index "pg_toast.pg_toast_19250_index_ccnew1" concurrently, skipping
WARNING: cannot reindex invalid index "pg_toast.pg_toast_19250_index_ccnew2" concurrently, skipping
WARNING: cannot reindex invalid index "pg_toast.pg_toast_19250_index_ccnew_ccnew" concurrently, skipping
ERROR: could not create unique index "index_incoming_referers_on_path_and_incoming_domain_id_ccnew3"
DETAIL: Key (path, incoming_domain_id)=(/votes/, 1165) is duplicated.