Solution : https://service.sap.com/sap/support/notes/2082466 (SAP Service marketplace login required)
Key words :
customer component han-lm-plt sap hana platform lifecycle management priority recommendations / additional info category, lifecycle management -> platform lifecycle management -> check, call /<target>/<sid>/hdblcm/hdblcm --action=update_host, multiple-host hana system header data released, /<target>/<sid>/hdblcm/resources/log_files directory, sap hana database lifecycle manager hdblcm, file /<target>/<sid>/hdblcm/signature, sap hana database lifecycle manager, sap hana studio installation/update validity, installed/updated sap hana studio