Error in creating external iceberg table

icurious
New Contributor II

I am new to Databrcicks and was trying to create an Iceberg table. 
I have configured the Credentials and External Location using the UI under Catalog > External Locations and Credentials. I am able to create a table by using the Browse feature.

But when I am trying to create an Iceberg table from the SQL Editor I am getting a strange error

CREATE TABLE nation2_iceberg
USING iceberg
LOCATION 's3://xyz/databricks/nation_iceberg'
as
SELECT *
FROM parquet.`s3://xyz/sf/nation.RV6Vad/data/56`;
This is the error:
[MANAGED_ICEBERG_OPERATION_NOT_SUPPORTED] Managed Iceberg tables do not support REPLACE on external tables.
The table does not exist and not using any REPLACE command.
Does anyone know what has to be done in or