I lost my Nav Item and Product Categories

I found this error but totally no idea how to show it. Can any one please Help?

[19-Jul-2014 19:52:13 UTC] WordPress database error Duplicate entry '1-category' for key 'term_id_taxonomy' for query INSERT INTOwp_term_taxonomy(term_id,taxonomy,description,parent,count) VALUES (1,'category','',0,1) made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/bp-fun/community.php'), the_content, apply_filters('the_content'), call_user_func_array, bp_replace_the_content, apply_filters('bp_replace_the_content'), call_user_func_array, BP_Blogs_Theme_Compat->create_content, bp_buffer_template_part, bp_get_template_part, bp_locate_template, load_template, require('/plugins/buddypress/bp-templates/bp-legacy/buddypress/blogs/create.php'), bp_show_blog_signup_form, bp_blogs_validate_blog_signup, wpmu_create_blog, wp_install_defaults