Do not multiply flag default to 1

To maintain the desired behavior according to the specification, the default value of the "Do not multiply" flag should be set to 1. This means that if no value is entered, the serialized GS1 can be multiplied. If a value of 1 is provided, it indicates that the coupon cannot be multiplied. Therefore, when creating the MOF (Manufacturer's Order Form), setting the default value to 1 will ensure that the intended behavior is preserved.