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The current model is the current copy of a data model and the most current version stored in the mart. By default, each time you save a model, a version of the model that existed before changes were made is saved. You can enable the creation of models that do not retain multiple versions at the library level from the Library Manager. Libraries that do not retain older model versions are called non-archiving libraries.
For non-archiving libraries, when two or more users modify the same model simultaneously, the original model is not preserved. This is because the Resolve Differences session cannot show if the model changed.
Note: The default setting is to retain multiple model versions in the library.
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