The Paketo CNB builder removed support for the Software Bill Of Materials (SBOM) stored in image labels, and validation of these label contents was removed from the Spring Boot system tests in reaction to that change.
In place of the image labels, structured SBOM files are written to a layer in the generated image. These will only be written by Spring Boot 2.7 and later, where the CNB Platform API was raised to a level that causes the SBOM layer to be generated. Spring Boot system tests should validate the SBOM contents that rely on information provided by Spring Boot.