Is sexual intercourse (Wati') permissible with an indentured servant (Mukataba) without a prior condition stipulated in the manumission contract?

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Sexual intercourse with the indentured servant without a prior condition is forbidden (Haram) according to the majority of scholars, including Sa'id ibn al-Musayyib, Al-Hasan, Al-Zuhri, Malik, Al-Layth, Al-Thawri, Al-Awza'i, Al-Shafi'i, and the people of Ra'y (Hanafi scholars). The evidence supporting the prohibition is that the contract of indenture (Kitaba) removes the master's right to utilize her sexual services (Bida'), which is compensated for in cases of mistaken intercourse (Shubha). This is analogous to a sale contract, and the relevant Quranic verse regarding the dominion over private parts (Quran 58:29, referring to 'those whom your right hands possess') is understood to be specific to legally married women. Furthermore, the master's ownership over her is weak because ownership over her benefits has ceased entirely; hence, if she is violated by mistake, the Mahr (dower) belongs to her, distinguishing her from an Umm Walad (mother of the master's child), whose ownership remains until the master's death.