Since FlaggedRevs is enabled for main namespace, and OCR Index and Page usually included in main namespace, FlaggedRevs shall be enabled for them as well, to prevent "rechecking" all pages in main namespace with inclusion of Page or Index.
See also a short discussion on ru-wikisource administration board:
https://ru.wikisource.org/wiki/%D0%92%D0%B8%D0%BA%D0%B8%D1%82%D0%B5%D0%BA%D0%B0:%D0%90%D0%B4%D0%BC%D0%B8%D0%BD%D0%B8%D1%81%D1%82%D1%80%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5#.D0.98.D0.B7.D0.BC.D0.B5.D0.BD.D0.B5.D0.BD.D0.B8.D1.8F_.D0.B2_.D0.B8.D0.BD.D0.B4.D0.B5.D0.BA.D1.81.D0.B5
Version: wmf-deployment
Severity: normal
URL: http://ru.wikisource.org/