Aliases must be unique within an AWS region. This includes aliases of both asset properties and data streams. Do not assign an alias to an asset property, if another property or data stream is using that alias.
Use the AWS IoT SiteWise console to update an asset property alias.
To update an asset property alias (console)
Navigate to the AWS IoT SiteWise console
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In the navigation pane, choose Assets .
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Select the asset from the table.
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Click the Edit button.
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Select the Property type in the Properties table.
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Find the property, and type the new alias in the property alias text field.
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Click the Save button to save the changes.