@AndyB5000 

If there are any BRs on the child table then they should stop

There is mistake in your function name

Try this and it should work fine

var queryStringCI = 'asset_tag=AF268729';
var CIchg = new GlideRecord('cmdb_ci_netgear');
CIchg.addEncodedQuery(queryStringCI);
CIchg.setLimit(10);
CIchg.query();
gs.info("----CMDB\t" + CIchg.getRowCount());
while(CIchg.next()){
CIchg.sys_class_name = 'cmdb_ci_ip_switch'; //table name of class changing too
CIchg.setWorkflow(false);
CIchg.update();
}

Regards
Ankur