Hello all, 
 
I'm trying to run the Dataflow and getting this error: 
 
Error executing node 133: Invalid schema: Error, Invalid key name: %!(EXTRA string=WhatId(Account).Name) (02K32000000CdmREAS_03C32000000TNDQEA4)
 
I can't find a knowledge article on this particular error. 
 
Can anybody speak to this? 
 
Thanks in advance.