Workflow Rule: Condition False even when satisfied

I want to limit the number of entries to a table to only one per user. For this, I am comparing the current row useremail to the existing ones in the table. Then a notification is sent to the user and the new record is deleted.
Below is my workflow condition:

The two values are equal but the actions are not executed.

I’d appreciate any help in fixing this or implementing this functionality differently.

Remove [_THISROW]. from your expression.