Error in importing Menus

Hello,
As the error message states, There is a duplicate entry with the same Title either in your data file or a duplicate is already there in the database. Please check, if you couldn't find, please share your backend & FTP login credentials along with the data file ( please provide database details in case of remote database ) via Contact us form, we'll look into it.

Trying to import Menus from another database -- it begins to bring some of them in, but then the process stops with the following error message:

Import abort with exception
Duplicate entry '1-1-Banners-*' for key 'idx_client_id_parent_id_alias_language'

Thanks for your help.