Challenge Transform String Properties doesn't validate result [RESOLVED]

Hi there,

I'm trying to complete this section but validation keeps failing. I've emptied the DB and reran the import. The expected 888 properties were set and the person bon property is showing as Date. I'm not sure if I'm missing something?

I ran through this again starting with a new sandbox and it worked this time. My guess is that I missed something on the previous import steps (e.g. changing one of the types from string to integer) but was able to pass that validation check, but whatever I missed had a knock on effect for this validation check.