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@@ -50,7 +50,7 @@ There are also [Kubernetes-specific deployment variables](../../user/project/clu
| `CI_DEPLOY_USER` | 10.8 | all | The authentication username of the [GitLab Deploy Token](../../user/project/deploy_tokens/index.md#gitlab-deploy-token), if the project has one. |
| `CI_DISPOSABLE_ENVIRONMENT` | all | 10.1 | Only available if the job is executed in a disposable environment (something that is created only for this job and disposed of/destroyed after the execution - all executors except `shell` and `ssh`). `true` when available. |
| `CI_ENVIRONMENT_NAME` | 8.15 | all | The name of the environment for this job. Available if [`environment:name`](../yaml/README.md#environmentname) is set. |
-| `CI_ENVIRONMENT_SLUG` | 8.15 | all | The simplified version of the environment name, suitable for inclusion in DNS, URLs, Kubernetes labels, and so on. Available if [`environment:name`](../yaml/README.md#environmentname) is set. |
+| `CI_ENVIRONMENT_SLUG` | 8.15 | all | The simplified version of the environment name, suitable for inclusion in DNS, URLs, Kubernetes labels, and so on. Available if [`environment:name`](../yaml/README.md#environmentname) is set. The slug is [truncated to 24 characters](https://gitlab.com/gitlab-org/gitlab/-/issues/20941). |
| `CI_ENVIRONMENT_URL` | 9.3 | all | The URL of the environment for this job. Available if [`environment:url`](../yaml/README.md#environmenturl) is set. |
| `CI_HAS_OPEN_REQUIREMENTS` | 13.1 | all | Only available if the pipeline's project has an open [requirement](../../user/project/requirements/index.md). `true` when available. |
| `CI_JOB_ID` | 9.0 | all | The internal ID of the job, unique across all jobs in the GitLab instance. |