PB: Importing is not straightforward and is not clearly explained.
1 you need two CSV files: nodes, and edges
2 the nodes file should contain ID and Label,, and possibly Modularity class (?)
3 then you must build an edge file, where you use ID, source, target, edgelabel. It does not contain the nodelabels (Myriel, Napoleon), but only "A", "B"... It is hard to build and illegible for maintenance !
allow a single table (Graphviz DOTfiles allow this). On could perfectly leave some cells blank
or at least
allow mentioning nonambiguous nodenames (Myriel, Napoleon) in the edge table