The generation of an ML model that does not reflect the underlying trend of the training dataset, resulting in a model that has diffculties with accurate predictions.

ISO/IEC TR 29119-11:2020 generation of a ML model (3.1.46) that does not reflect the underlying trend of the training data (3.1.80), resulting in a model that finds it difficult to make accurate predictions (3.1.56)

ISTQB - CTAI Syllabus The generation of an ML model that does not reflect the underlying trend of the training dataset, resulting in a model that finds it difficult to make accurate predictions (ISO/IEC TR 29119-11)