When generating code in an organization with Person Accounts enabled, custom Contact fields on an Account are exposed as Account.ContactField__pc and Account.OtherContactField__pc, but the code generator names these as pc and pc_dup (then pc_dup_dup and so on for more fields), instead of contactField and otherContactField.
This isn't a huge deal, since you can still fix it by overriding the defaults per the awesome docs:
{
"apiName": "Account",
"fieldMappings": [
{
"apiName" : "ContactField__pc",
"propName": "contactField"
},
{
"apiName" : "OtherContactField__pc",
"propName": "otherContactField"
}
]
}