OMG I think I found it. I was searching other posts about "java.sql.BatchUpdateException: Duplicate entry" and read about before scripts that should not contain update(). Well look what I found. This is a before script and when I turned if off, everything worked as designed with the exception of the asset tag did not get populated.
(function executeRule(current, previous /*null when async*/) {
if (current.cost<=2000)
{var str = current.model.manufacturer.name;
var ser = current.serial_number;
var res = str.slice(0, 3);
if (current.model.manufacturer.nil()){
current.asset_tag=ser;
}
else if (current.serial_number.nil()){
current.asset_tag=res;
}
else {
current.asset_tag=res+"-"+ser;
}
current.update();
var ca = new AssetAndCISynchronizer();
ca.syncRecords(current, 'cmdb_ci');
}
})(current, previous);
