WCS installations chain

Hi all,

I have a trouble, my configuration is this:

System1: Development

System2: Management

System3: Delivery

S1 publishes to S2, S2 publishes to S3.

Firs of all I developed in S1 and then published through full chain.

Contributors created a lots of contents in S2 (to publish to S3).

I continued my develop in S1 (creating Templates, CSElements and any content)

If one of the assets that I created in S1 takes a ID that already exists in S2, what happens during publication S1 -> S2?

Example1:

In S2 I have Content_C:1393269329854 (a content created by Contributor)

In S1 I Have Content_C:1393269329854 (created to be mapped in a new Template, for example)