Export Graph to Neo4j

[ghost]

Bonjour,

I have done the following test :
Step1 : Create in an empty database a new graph with several nodes and several edges
Step2 : I connect from Cytoscape to Neo4j database.
Step3 : I import from a cypher query, one or two nodes
Step4 : Expand bidirectional from one node
<< At this step the graph has nothing new, meaning that the export back to neo4j should let the database on the same state as the origine>>
Step5 : Select all the nodes and edges on cytoscape
Step6 : Export to Neo4j.

The problem is that duplication of objects (nodes and edges) come . Cytoscape create properties fields (like _cytoscape_network or SUID) that allow the distintion between "old" objects and "new objects".
My question is how to prevent the n-uplication of objects. How to I setup Cytoscape to prevent this n-uplication when exporting graph to neo4j ?

Many thanks for your help

Have a nice day

B. FRANCK