1. A configuration value management apparatus that collectively manages configuration values of multiple image forming apparatuses, the configuration value management apparatus comprising: a CPU coupled to a memory, wherein the CPU is programmed to provide: a generating unit that generates virtual configuration values for a specific image forming apparatus using a model-based configuration value schema that defines a configuration value schema for each model of multiple image forming apparatuses, and using device configuration data indicating a configuration of a device in the specific image forming apparatus; and an applying unit that applies, in a case where a new settings item is present in the virtual configuration values generated by the generating unit, the new settings item to settings items in tenant configuration values.