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002721: Calculation rule cannot be created using a field that is system maintained.

Description

The Field that is referenced for the calculation rule is a system-maintained field and cannot be used—for example, ObjectID, GlobalID, Shape length, Shape area, and so on.

The ArcPy Field class can be used to query which fields have the Required property.

Solution

Ensure that the field used for the calculation attribute rule is not system maintained.

For more information, review the documentation for the Attribute rules, Add Attribute Rule, and Import Attribute Rule tools.