Tag index pane -> context menu -> Rename... -> error!

[Merriam]

#Zim 0.68 on Windows 10.

# Error message prompted when I try to "Rename Page..."
# in right-click mouse context menu on a tag in tag index pane.
# I wanted to rename a tag(e.g., @AAA into @BBB, so that all the pages
# containing @AAA would be changed into pages containing tag @BBB)

# Is this bug already reported? I just started using Zim and wonder
# if this feature is going to be implemented so I report here. Thanks for your great work!

This is zim 0.68
Platform: nt
Locale: ko_KR cp949
FS encoding: mbcs
Python: (2, 7, 14, 'final', 0)
Gtk: (2, 24, 10)
Pygtk: (2, 24, 0)
No bzr version-info found

======= Traceback =======
  File "zim\actions.pyo", line 157, in do_activate
  File "zim\actions.pyo", line 140, in func
  File "zim\gui\__init__.pyo", line 1063, in rename_page
  File "zim\gui\__init__.pyo", line 2720, in __init__
AttributeError: 'IndexTag' object has no attribute 'basename'