This Trailhead issue seems to have frustrated half a generation of Salesforcers. This should be pretty straightforward but the syntax checker does not allow "MailingPostalCode" for the good reason that it is nowhere to be found in the insertable fields. I can insert a billing postal code to get passed the syntax checked, but then I fail the challenge. Is the issue with the instructions, or is my Account object actually missing a MailingPostalCode ?

This Trailhead issue seems to have frustrated half a generation of Salesforcers. This should be pretty straightforward but the syntax checker does not allow "MailingPostalCode" for the good reason that it is nowhere to be found in the insertable fields. I can insert a billing postal code to get passed the syntax checked, but then I fail the challenge. Is the issue with the instructions, or is my Account object actually missing a MailingPostalCode ?