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# Update or Remove Objects and Databases

To update or remove an object use the following actions:

- To complete training for all objects that exist in the Media Server database but have incomplete training, use the action `BuildAllObjects`. To confirm that training was successful, use the action `ListObjects` (see List the Objects in a Database).
- To add additional training images to an object, use the action `AddObjectImages`. Media Server does not use the new images for object detection until you run the action `BuildObject`. To confirm that training was successful, use the action `ListObjects` (see List the Objects in a Database).
- To remove a training image from an object, use the action `RemoveObjectImages`.
- To modify the training options for an object, use the actions `SetObjectTrainingOption` and `UnsetObjectTrainingOption`.
- To change the label of an image that you added to an object, use the action `RelabelObjectImage`.
- To move an image of an object from one object to another, for example if you add an image to the wrong object, use the action `MoveObjectImage`.
- To add, remove, or update custom metadata for an object, use the actions `AddObjectMetadata`, `RemoveObjectMetadata`, and `UpdateObjectMetadata`.
- To change the identifier of an object you added to an object database, use the action `RenameObject`.
- To move an object to a different database, use the action `MoveObject`.
- To remove an object from a database and discard all associated images and metadata, use the action `RemoveObject`.

To update or remove object databases, use the following actions:

- To rename an object database, use the action `RenameObjectDatabase`.
- To delete an object database and all of the information that it contains, use the action `RemoveObjectDatabase`.

For more information about the actions that you can use to train Media Server, refer to the Media Server Reference.

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