CRM 2011 - facing language related issue while importing in managed organization.

Hi,

I am following error while importing managed solution in CRM 2011 from my unmanaged environment to managed environment.

"Translated labels for the following languages could not be imported because they have not been enabled for this organization: 1036"

My unmanaged environment has got French(1036), Russian(1049) and Spanish(3082) languages enabled for organization. In my managed environment, I have Russian(1049) and Spanish(3082) languages enabled. So I though of enabling French language in managed environment to fix this issue. But I am not able to enable French(1036) language for the organization. When I try to enable French language, it gives me error "Parent report already links to another report with the same name." I also tried re-installation of French language pack. But still I am getting same error.

Can you please help    me with pointers in resolving this issue?

Actually, I do not need French language in my managed environment. So if somehow I could remove <description> tag from customizations.xml for French language, solution importing might work.
I am not able to understand why these languages are exported in customizations.xml, even when I disable languages on managed environment organization.

Thanks.