Can't Map Data To Variable Because It's 'Ambiguous'

I’m trying to create a simple flow to loop through 10 records from a response.

I’ve chosen the list that contains those records for my For Each block and now I want to store the ID from each record in a variable.


So I’ve added a Create Data step but when I scroll down to the Data section, I can’t navigate and select the ID, the Data just shows as Ambiguous.

Create Data Block

Whereas when I was creating the For Each block, I was able to navigate down the path to the ID if I wanted to.

Is the path that I’ve chosen in the For Each step wrong or is there some other problem?

Turns out this was the issue -

Which can be solved like this -