[q] please help busybox problem

i've accidentally uninstall busybox (don't ask why), now there's no busybox on my z1, but when i'm tring to install busybox using busybox again it always failed, the message "busybox was now sucsess, try to change location to fox the issues". Anyone have the solution for this problem? I'm using xperia Z1 sol23 (japan version), rooted, lockbootloader, no cwm. In my system/ xbin there's some files but no busybox files. Help me please

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