When you activate the previous environment from the Setting tab, you will see the Model's Log mutations settings (A). Use the scroll bar to navigate to the Deduplicate (B) setting. When you activate the setting with the checkbox, the frame expands downwards to show the deduplicate settings (C).

This option can be checked if you want to deduplicate existing or newly added data in your database.

As shown in the example, you can specify the property (A) from the model and the basis on which you want to qualify the duplication (B) using the drop-down menu options.

Match on (A):

Choose a property (B) for determining on which data should be deduplicated. Specify the basis used for the check (C).

Optional match on (D)

When the chosen property of your new/changed record matches the existing data with the Match on option, you can specify an optional check.

Update property on match (E)

Set the property/properties that should be updated when duplicate data is found. The new value overwrites existing data on the properties set in this field set.
​Note: The oldest data value overwrite the newer data in your record on each property that is not set in this field set. The new data is removed.

When to deduplicate (D)

Use the checkboxes to specify at what point deduplication is performed:

create - deduplicates on all Create operations of the model.
​update -deduplicates on all Update operations of the model.
​save - deduplicates on all Save operations of the model even where the record is unchanged. This setting, overules the create and update.

You can add additional rows for different properties in your model.

Click on the Changes button in the menu bar (previous environment) to show application metadata (structural) changes. Details when a change was applied and by which user.