R80.30 Management : Empty action in custom report

[Support_Team_Bi]

Hello All,

I have upgraded Management by changing from appliance R77.30 to open server R80.30. Migrate export are done (Gateway is R77.30 12600). Then I moved logs from r77.30 to r80.30 and set index in r80.30 to 365 days. I have some questions about report that I generated.

1. In action count of firewall blade on custom report view, there are empty action show in table. what is the empty action ? please explain it.