I have a table that has a parent child relationship setup through ID and parent_ID fields. I have number fields on each record and when an automation is triggered I want to add the child record's field 2 and field 3 values to the parent record's field 1 value. I've setup the automation to trigger from the child record. It looks up the parent record, but when I try to update the parent record and set it's field1 value to current field1 value+child field 2+child field 3, I get an error.
How can use a simple formula like "+" in the automation action?