is there any way to clean the history on client?
In Forensics and Anti Ransomware blade, you can mark the incidents by clicking the first one, holding the shift, and clicking the last one. Then, you can right click on your selection and choose "Delete" from the popup menu.
In TE blade there is no such capability.
The motivation was that on Forensics, there might be a need to clean the disk from reports that were generated so the feature is important. In the other blades, the value of the cleanup is lower so it was not implemented.
Retrieving data ...