Clean temp files before run maco_upgrade

cluster/maco.apply.update.sh

@@ -232,6 +232,14 @@ Try to apply Maco upgrade".
 
 }
 # }}}
+clean_host() {                                                  # {{{
+
+	debug_message "clean_host − \
+Try to clean temp files,…"
+
+	rm -f -- "${MACO_TMP_FILE}" "${MACO_TMP_URGENT_FILE}"
+}
+# }}}
 main() {                                                        # {{{
 
 	manage_args "${ARGS}"
@@ -278,10 +286,12 @@ main() {                                                        # {{{
 	### First, ensure maco.service is enable for next reboot
 	systemctl --quiet enable maco.service > /dev/null 2>&1
 
-	## Then try to upgrade Maco
+	## Then, Maco is ready for upgrade
+	### First clean temp files on the host
+	### And try to upgrade Maco
 	### If success: exit 0 (leave reboot to maco/atd)
-	### Temp files will be automatically cleaned at next startup
+	clean_host \
-	upgrade_maco \
+		&& upgrade_maco \
 		&& exit 0
 
 }