Filter out column not in reference table

[Tom_automated]

I have a behavior that I do not want to show if the referenced Title column is not found in the referenced table . I’m having some difficulty constructing the correct filter statement.

My table:

The table being referenced is Form Responses:

So if Title in Gcal does not appear as the UNIQUEID in Form Responses I do not want the behavior to appear.

I’ve tried this FILTER("Form Responses", ([_THISROW] = [UNIQUEID])) but get this error:

The expression is valid but its result type ‘List’ is not one of the expected types: Yes/No