Last Modified: Apr 29, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 21.0.0, 21.0.0.1
Opened: Jun 13, 2024 Severity: 3-Major
After creating an HA group with a trunk in an LTM tenant, the first reboot triggers an error: "Invalid attempt to register an n-stage validator; the stage must be greater than the current stage and within 1–101 (current stage: 7, registered: 5). Unexpected."
No impact on TMM VLAN traffic
Occurs when, - BIG-IP tenant running on F5OS - High availability system - HA group with a trunk - The tenant is rebooted for the first time
Rerun the tmsh create sys ha-group command.
None