[Koha] Cannot place hold

Hi, I need your help. I can not place hold from staff interface at 3.14.5 At staff interface, from Home › Catalog find particular item which I try to hold, but Koha reply as: Cannot place hold Too many holds: mao has too many holds. mao is reader name. In fact this is the first hold for mao. I check the Holds Policy at Home › Administration › System preferences. set maxreserves as Patrons can only have 10 holds at once. -- Wishing you all the best. . . . Anthony Mao 毛慶禎 ＋886 2 29052334 (voice) + 886 2 29017405 (FAX)