Tracking down a cycle error

[#1]

When I open a data table, I get a cycle detected error that I have to ignore every time. I can't seem to figure out what is causing the error although it apparently has something to do with the table variable in my column formula. 

Here is the formula:

and here is the log entry showing the issue

Can anyone help me understand what is going on here? The data table actually works fine after I click "Ignore all cycles" in the pop up window. But I'd like to understand what the issue is as well as eliminate the annoying error.

Thanks