When deploying Designer process models with Deployer in a runtime-based project, Deployer copies the generation receipt from the source environment to the target environment. Because the logical-to-physical server mapping might contain old data, the regeneration process connects to the previous logical server and cleans up the process-related assets there (for example, deleting associated triggers and services), in addition to creating the new assets on the new logical server. With no generation receipt, this mapping information is not available and the clean-up procedure cannot occur.