Hi,
When all the change documents of an RFC are withdrawn, the RFC has the status changed to "Validation". It allows you to reject it definitely if you don't need it anymore, or to create new change documents.
If the RFC is in status "Extend Scope" when you withdraw the change documents, it will also automatically have the status changed to "Validation".
In both cases, you need to configure the "Specify Status Settings for Preceding Document" in IMG. For each of the Change documents, in status E0010 (withdrawn), set the preceding document (in my case os ZMCR) to E0014 (Validation).
See the pictures attached.
Regards,
Raquel