custom Incremental strategies

The problem I’m having

I’ve created a macro to have a custom Incremental Merge and call it get_incremental_merge_conditional_sql

Then call this Macro in my models by this config setting:

{{config(
 materialized='incremental',
 incremental_strategy='merge_conditional',
 unique_key = ['order_id','status'],
 predicates = ['DBT_INTERNAL_SOURCE.status_datetime_nzt > DBT_INTERNAL_DEST.status_datetime_nzt'],
 update_date_column = ['status_datetime_nzt'],
 tags=["magento"]
 )}}

When I run my model return this error:

Invalid incremental strategy provided: merge_conditional
      Expected one of: 'merge', 'replace_where', 'append', 'insert_overwrite'

looks Models can not find this new Macro…
I’ve used this document to create a new Incremental macro:

Do I need to do more settings, please help

Thanks
Mali

The context of why I’m trying to do this

What I’ve already tried

Some example code or error messages

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I’m also encountering this issue on dbt 1.7 and the bigquery adapter. Did you ever find a solution? I’m putting my custom incremental strategy in ./macros and I have many other macros that successfully run from that directory.