Building should be able to be done in permissive mode incase the topic titles have changed since the content specification was pushed. As such you should be able to build by using the --permissive option from the client.
Added. Content Specifications can now be built under permissive mode by using the --permissive (-p) option from the client. This allows for books to still be built if a topics named is changed since the latest Content Specification push. (Requires client build 0.15.0)
[jwulf@radhe Content_Spec_Processor]$ csprocessor build -c 6192 CSProcessor client version: 0.17.0 Loading configuration from /home/jwulf/.config/csprocessor.ini Web Service at http://csprocessor.cloud.lab.eng.bne.redhat.com:8080/ version: 0.21.4 ERROR: Line 73: Invalid Topic! Existing topic title doesn't match. -> Specified: Workflow Automation [6212] -> Topic 6212: Workflow Automation. ERROR: The Content Specification is not valid. ERROR: Unable to build due to the Post Content Specification failing to process. [jwulf@radhe Content_Spec_Processor]$ csprocessor build -cp 6192 CSProcessor client version: 0.17.0 Loading configuration from /home/jwulf/.config/csprocessor.ini Web Service at http://csprocessor.cloud.lab.eng.bne.redhat.com:8080/ version: 0.21.4 INFO: Content Specification successfully built with 0 Errors and 0 Warnings - Flawless Victory! INFO: Output saved to: /home/jwulf/scratch/Content_Spec_Processor/Content_Spec_Processor_Guide.zip