BigQuery as sink:- Write operation(INSERT) does not reflect any error while adding values to Table Key and Dedupe by Fields

When using BigQuery as Sink, no error is reflected on performing (INSERT) write operation and proving values to Table Key and Dedupe By fields

Steps to reproduce:-

1.Open the BigQuery Sink
2.Click on properties.
3.Go to Advanced Operations
4.Select INSERT operation
5.Go to Table Key
6.Enter any random value which does not exist in the table/Exists in the table
7. Go to Dedupe By
8.Enter any random value which does not even exist in the table/Exists in the tale
9.Validate the properties
10.No error is reflected

Expected result:-

Table Key and Dedupe by should be disabled while using INSERT operations as per the documentation.
Table key :- Determines relation between tables during Update and Upsert operations.