The actual parent poms are being generated from below two pom-template
ccsdk/parent/odlparent/setup/src/main/template/pom-template.xml
ccsdk/parent/springboot/spring-boot-setup/src/main/template/pom-template.xml
Any updates needed should be made to respective template and not to the generated pom.xml file/files.
Every parent pom has associated properties files (src/main/properties).
Setup module will read those properties and populate respective values within generated pom.xml