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001990: The subnetwork system diagram <value> is managed by the system, it cannot be updated

Description

The diagram you are trying to update is a subnetwork system diagram. Subnetwork system diagrams are particular diagrams that are fully managed; that is, created, updated, deleted by the Update Subnetwork tool.

Solution

You can generate such a diagram yourself from the result of the trace returned for the same subnetwork. Then, you will have full rights on this diagram.