Add BR Trigger conditions properly something like - impact changes || priority changes
Refer sample logic below:
//sample logic
var grST = new GlideRecord('child table') // childtablename
grST.addQuery('parent',current.sys_id); // add your related list condition, added parent as example.
grST.query();
while(grST.next())
{
grST.priority = current.priority // map directly if backend values are same else do an if check and map it.
grST.impact = current.impact //map directly if backend values are same else do an if check and map it.
grST.update();
]
There are so many similar ootb functionalities( Incident to Incident task, Change to Change Task), you can take a look in your instance.
Mark it helpful if this helps you to understand. Accept solution if this give you the answer you're looking for
Kind Regards,
Rohila V
4x ServiceNow MVP
