Step not yet complete in Data Cloud In the Data Lake Object ‘Lead’, we can't find the text field mapping for ‘Is US Based’.

I am in the following module: Learn How Data 360 Works ==> Explore Data 360 Core Functionality  ==> Create Fields and Map Your Data

I created all the mappings correctly including the "Is US Based" but get the following error: 

In the Data Lake Object ‘Lead’, we can't find the text field mapping for ‘Is US Based’.

I have tried all the workarounds like attempting to delete the "Lead_Home" mappings as well as the entire "Lead_Home" Data stream but I get errors in both instances saying fields are used elsewhere, etc. 

Thoughts?