Solution : https://service.sap.com/sap/support/notes/825118 (SAP Service marketplace login required)
Key words :
user-specific display hierarchy tree, unique key relate_node node_text node, data gt_existing_nodes type /sapapo/amo_hrchy_node_tab, gt_existing_nodes type sorted table, local instance class attribute, /sapapo/alert_monitor class, /sapapo/amon_setting reason, /sapapo/alert_monitor->gv_alert_no_for_node_id, terms amo hrchy, import support package 06
Related Notes :
| 848140 | AMO: Two top nodes for the same alert view |
| 500051 | Alert monitor overview (AMO) alert types |