I don't know the 'history' of the issue as we have just implimented reporting and the 2nd PSU missing alert shows up in thousands!
We are runnning v7.0.9.
this is the output you requested...
PAR-2 $ diagnose hardware deviceinfo psu
Power Supply Status
PAR-2 $ exec sensor
list List sensors and readings
PAR-2 $ exec sensor list
1 PSU  OK
2 PSU  LOST
3 SYS Fan1 Speed 5172 RPM
4 SYS Fan2 Speed 5172 RPM
5 Ext Temperature 38.38 C
6 Fan Temperature 27.00 C
7 CPU_ON-DIE Temperature 41.53 C
8 BCM_switch Temperature 55.10 C
9 B50185 Temperature 66.50 C
10 B50210_1 Temperature 34.64 C
11 B50210_2 Temperature 38.53 C
Find it - Fix it - Forget it = network management !!