Help:Schema/Error handling/The property ... is not defined and the definition does not allow additional


 * Error: Error text::The property ... is not defined and the definition does not allow additional
 * Type: Error type::Validation error
 * Example: ["constraints", "The property mandatory_properties is not defined and the definition does not allow additional properties"]

Explanation
The validation schema expects that only properties that are defined in the JSON schema are to be used within a constraint schema. As for the example,  is defined for the   schema type but not for   (both types a have different validation schemata) which is why the validation error appears.