Consider a scenario where you have a rule set on Trigger Details for monitoring a log file using the FKM sampler.
Some time later the FKM is accepted - Note that the triggerDetails column severity has changed from critical to undefined. This is because there is no value in the cell.
This will result in item deleted message writing to the event ticker
This will also reflect in Database Logging - Event Table Entry
This can happen in any plugin where you get a scenario where a cell is removed. Toolkit example below