Grading: Its men are thiqah, but narrating it as "muttasil" (with a connected chain) is an "error" (wahm) by al-Husayn bin Muhammad bin Ziyad or by a narrator below him.
Technical note / Defect ('illah): This is because Abu Dawud al-Sijistani narrated it from Muhammad bin al-Muthanna as "mursal", and this is supported by the fact that 'Abdullah bin al-Mubarak narrated it from 'Ali bin al-Mubarak as "mursal" as well. Also, Abu Hatim al-Razi said, as in "al-'Ilal" (1259): Yahya bin Abi Kathir narrated it from Yazid bin Nu'aym from Sa'id bin al-Musayyab, not going beyond him (i.e. without mentioning a Companion), as marfu' (attributed to the Prophet).

Reference / Source: Abu Dawud (2132) narrated it from Muhammad bin al-Muthanna with this same chain from Sa'id bin al-Musayyab: "A man called Basrah bin Aktham", and then he mentioned the whole hadith.

Reference / Source: Sa'id bin Mansur (693), and through his route Harb bin Isma'il in "al-Masa'il" (1/ 307), and al-Bayhaqi (7/ 155) narrated it from 'Abdullah bin al-Mubarak, from 'Ali bin al-Mubarak, likewise as "mursal".