vim v6.3 with cvs and Calendar plugin gives error [SOLVED]

[khippy]

Hi, having the cvs-plugin for vim installed, I emerged the calender plugin, too. Now I get the following error when starting vim:
Error detected while processing /usr/share/vim/vimfiles/plugin/cvscommand.vim: line 1082: E227: mapping already exists for \ca
Where to fix that? - I edited /usr/share/vim/vimfiles/plugin/calendar.vim and changed <LEADER> below "Calendar Commands" to an unused value.
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