Dependent components for change set deploy
Key Takeaway
A change set deploys only the components you put in it. Add every dependency that doesn't already exist in the target org, including a custom object's fields.
A change set moves metadata components, such as custom objects, fields and Apex classes, from one org to a connected org (the target org). Many components refer to other components to work. These other components are called dependencies, or dependent components. App builders must find and add dependencies before they upload the change set, because a missing dependency can make the deployment fail.
What a change set must contain
A change set deploys only the components you put in it. Each outbound change set must contain every dependency that doesn't already exist in the target org. You can leave a dependency out only when it already exists in every org where the change set will be deployed.