DatatableController::prepareValue(): The field type time is not editable.

    private function normalizeValue($originalTypeOfField, $value)
    {
        switch ($originalTypeOfField) {
            case Type::DATETIME:
            case Type::TIME:
                $value = new DateTime($value);
                break;
            case Type::BOOLEAN:
                $value = $this->strToBool($value);
                break;
            case Type::TEXT:
            case Type::STRING:
                break;
            case Type::SMALLINT:
            case Type::INTEGER:
                $value = (int) $value;
                break;
            case Type::BIGINT:
                $value = (string) $value;
                break;
            case Type::FLOAT:
            case Type::DECIMAL:
                $value = (float) $value;
                break;
            default:
                throw new Exception("DatatableController::prepareValue(): The field type {$originalTypeOfField} is not editable.");
        }

        return $value;
    }