FIX: rescue error when importing category structure

lib/import_export/importer.rb

@@ -76,6 +76,7 @@ module ImportExport
       @categories.sort_by! { |c| c[:parent_category_id].presence || 0 }
 
       @categories.each do |cat_attrs|
+        begin
           id = cat_attrs.delete(:id)
           permissions = cat_attrs.delete(:permissions_params)
 
@@ -94,6 +95,9 @@ module ImportExport
             post.save!
             post.rebake!
           end
+        rescue
+          next
+        end
       end
 
       self