An attempt to synchronize the Arch Linux package databases failed due to a 404 Not Found error when fetching extra.db from the TUNA mirror.
``` ~ sudo pacman -Syu :: Synchronizing package databases... core is up to date extra.db failed to download archlinuxcn is up to date error: failed retrieving file 'extra.db' from mirrors.tuna.tsinghua.edu.cn : The requested URL returned error: 404 error: failed to synchronize all databases (failed to retrieve some files) ``` According to the mirror status page, the last reported sync time is 2025-12-14 19:39, which is earlier than the failure timestamp. -- 您收到此邮件是因为您订阅了 Google 群组的“TUNA 主邮件列表”群组。 要退订此群组并停止接收此群组的电子邮件，请发送电子邮件到[email protected]。 如需查看此讨论，请访问 https://groups.google.com/d/msgid/tuna-general/aT6umKzYQw98uwPg%40monika。
