Package version	From	To	Elapsed (days)	Error rate (per day)	Error count	Actions

CLEAN UP TABLES:
To remove crashes older than 6 months :
DELETE FROM acra_crashes WHERE added_date < UNIX_TIMESTAMP(DATE_SUB(NOW(),INTERVAL 180 DAY));
To remove crashes with a specific package name and version :
DELETE FROM acra_crashes WHERE package_name='com.insyncapp.lpgworld' and app_version_name='1.1';
DELETE FROM acra_crashes WHERE app_version_name='';