[Bug]: Failed to parse docker-compose.yaml (Airflow)

[sdezza]

Description

I'm encountering an issue with my docker-compose.yaml from Airflow compose file where I receive the error Mapping values are not allowed in multi-line blocks. This error occurs when attempting to use an anchor and alias for reusable configuration blocks.

Airflow documentation relative to docker compose:

Fetch docker compose:
curl -LfO 'https://airflow.apache.org/docs/apache-airflow/2.9.2/docker-compose.yaml'

Minimal Reproduction (if possible, example repository)

• Get docker-compose.yaml file.

• Facing first error;
  Multiple documents are not supported at line 29 (near "---").

• After deleting "---"
  Mapping values are not allowed in multi-line blocks at line 48 (near "&airflow-common").

Exception or Error

No response

Version

v4.0.0-beta.306