I switch the display of Wishlist_Sidebar from right to left, using the following codes, but the sidebar remains in both right and left sidebar.

<reference name="right">                
    <action method="unsetChild"><name>wishlist_sidebar</name></action>
    //.....
</reference>
<reference name="left">
     <action method="insert"><blockName>wishlist_sidebar</blockName></action>
</reference>

How to fix this problem

magento block magento-1.7
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