Is there simple way to change event action name by site id in piwik? Or everything must be done manually in database? Or transfer one action name to another?
There is a way to delete everything by site id
DELETE FROM piwik_log_visit WHERE idsite = X;
DELETE FROM piwik_log_link_visit_action WHERE idsite = X;
DELETE FROM piwik_log_conversion WHERE idsite = X;
DELETE FROM piwik_log_conversion_item WHERE idsite = X;