Regarding dbt model versioning

Help
1

Hi there
I am started exploring the model versioning feature
For Example
If i have table called CO2_EMISSIONS_BY_COUNTRY

For this particular model I created v1 and v2
v1

SELECT
    CAST("Year" AS INTEGER) AS Year,
    ENTITY AS Country,
    CAST(NULLIF(Annual_CO2_emissions, '') AS FLOAT) AS TotalEmissions,
FROM SOURCE

v2

SELECT
    CAST("Year" AS INTEGER) AS Year,
    ENTITY AS Country,
    CAST(NULLIF(Annual_CO2_emissions, '') AS FLOAT) AS TotalEmissions,
    CAST(NULLIF(Per_capita_CO2_emissions, '') AS FLOAT) AS PerCapitaEmissions
FROM SOURCE

In version 2 i added new column PerCapitaEmissions

In schema.yml

version: 2
models:
  - name: co2_emissions_by_country
    description: CO2 Emission by different Country
    latest_version: 2
    versions:
      - v: 1
        columns:
          - include: all
      - v: 2
        columns:
          - include: all
        config:
          alias: co2_emissions_by_country

And also add this generate_alias_name macro

{% macro generate_alias_name(custom_alias_name=none, node=none) -%}
    {% do return(adapter.dispatch('generate_alias_name', 'dbt')(custom_alias_name, node)) %}
{%- endmacro %}

{% macro default__generate_alias_name(custom_alias_name=none, node=none) -%}

    {%- if custom_alias_name -%}

        {{ custom_alias_name | trim }}

    {%- elif node.version -%}

        {{ return(node.name ~ "_v" ~ (node.version | replace(".", "_"))) }}

    {%- else -%}

        {{ node.name }}

    {%- endif -%}

{%- endmacro %}

when run dbt run i am getting error. i am running this models for the first time.

20:48:48  Database Error in model co2_emissions_by_country (models/co2_emissions_by_country_v2.sql)
20:48:48    001998 (42710): SQL compilation error:
20:48:48    Object 'CO2_EMISSIONS_BY_COUNTRY' already exists as TABLE
20:48:48    compiled Code at target/run/data_transformations/models/co2_emissions_by_country_v2.sql

and i think it is caused by alias field

config:
          alias: co2_emissions_by_country

but when removed all the models works fine like it will create
co2_emissions_by_country_v1 and co2_emissions_by_country_v2
successfully

can anyone please advice me regarding the above situation.

Thank you