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When the category is added after(there are already questions), blank(state not belonging to specific category) cannot  be chosen at category selector  in question-editing page.

I think that it becomes impossible to take the correspondence when the operation of the category is started on the way. How about you?

1 Answer

+1 vote
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In the 'Categories' page of the 'Admin' panel, switch on 'Allow questions with no category'. If I didn't understand the question please explain in more detail.
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Thank you gidgreen. You are right. I was overlooking this option, Sorry.
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