After Upgrade ISE 2.6 to 3.1 Data Health-Summary No data found

[KedaiMimih]

Hi Everyone,

We found cases after upgrading ISE 2.6 to 3.1.

Our client has 2 ise nodes to form a cluster, upgrading ise per node, the upgrade has been completed on node1 and next will be on node2
but before we upgraded on node2, there were cases found on node1 after the upgrade, namely, when we wanted to do a Health-Summary report, in the month
before the upgrade (April) the status was "No data found".

1. Why did we report Health-Summary in April with the status "No data found"?
2. What must be done so that the previous month's Health-Summary is still available, when you want to upgrade?

Notes:
Upgrade ISE 2.6 to 3.1 in May
Check Report Health-Summary for April ("No data found")

Thank You

[rezaalikhani]

Hi;

Try "Reset M&T Session Database" option from "application configure ise" CLI option.