[O] Why my config about org-log-reschedule didn't work?

[address@hidden]

I think if I set the variable 

(setq org-log-reschedule (quote time)) 

When I change the schedule time of a task, a drawer will be created. But nothing happened as I did so. Even if I setuped a new emacs, with the only conifg line above. It still did not work.

What did I missed? Thank you in advance.

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address@hidden