Anki does not allow to review cards in custom study

[Rumo]

I think this is the same question I answered here:

Cannot Custom Study review cards

The “Increase today’s review card limit” custom study has only an effect when you have exceeded the “Maximum Reviews/Day” (set to 200 by default) but still have due cards in the concerned deck. However, as I understand your situation, you want to study cards that are not due, yet. For that you can use the “Review ahead” custom study or create a filtered deck with “Rescheduling” enabled. But note that this is generally not a good idea. You will without a doubt get some benefit from additional r…