How to use action "Tables: Update a Row " ?

Ye_939471

Hello, dear team:
I tried to use the action Tables: Update a Row
I just want to make a simple update for test.
I tried to input PN&Qty, {{PN}}&{{Qty}}, {{pn}}&{{qty}},
However error persists always: The "Columns" and "Look up column names" field values are incorrect handlebar references.
Could you please check my test case in the picture and tell me how can I input the fields?

Ye_939471

Hello, dear team:
The problem is solved after several trying.
Thank you.

Jeff_182127

@Ye_939471: how was this problem solved?