Ubaydullah bin Abdullah said that Sayyiduna Umar (may Allah be pleased with him) used to flog those who made false accusations against the women of the people of the Millah. This is munqati' (disconnected). Even if it were established, it would be understood as ta'zir (discretionary punishment).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحدود / 17152