KeyError in Script Event

Ignition
,
1

Hi all,
I am attempting to change a property value in a script event.
Here is the code I have:

	table = self.getSibling("Table_0")
	columns = table.props.columns
	rowStyle = {'background-color':'var(--warningSecondary)'}
	newRow = {}
	
	for col in columns:
		if col.field == 'ReqID':
			pass
		newRow[col.field] = {'value': pyds.getValueAt(0,col.field), 'action':'update', 'enabled':True, 'display':True, 'style':rowStyle}
	
	newRow['updateMe'] = True
	newRow['deleteMe'] = False
	system.perspective.print(newRow['PartNumber']['enabled'])

This all works fine. BUT, if I add newRow['PartNumber']['enabled'] = False before the print statement, I get a KeyError. Why do I get this error and why can I not change this value?

EDIT:
I just discovered that I can change that value like this, by including it in the loop with an if statement:

	    for col in columns:
	        if col.field == 'ReqID':
	            pass
	        newRow[col.field] = {'value': pyds.getValueAt(0,col.field), 'action':'update', 'enabled':True, 'display':True, 'style':rowStyle}
	        if col.field == 'PartNumber':
	        	newRow['PartNumber']['enabled'] = False
2

What was the exact error ?

3 
com.inductiveautomation.ignition.common.script.JythonExecException
Traceback (most recent call last):
  File "<function:runAction>", line 41, in runAction
KeyError: 'PartNumber'

	caused by org.python.core.PyException
Traceback (most recent call last):
  File "<function:runAction>", line 41, in runAction
KeyError: 'PartNumber'