Over the years I have heard Bolsa used in a general way to refer to any type of bag, be it a sack, a piece of luggage, a pocket, or a purse. However, maleta refers to a suitcase (bolsa de viaje) (equipaje) luggage UK, baggage US
I guess that depends where you are from: https://dictionary.reverso.net/english-spanish/bag/forced
Why doesn't "No necesito una maleta work?" If other times you don't have to include the pronoun? The conjugation should represent what you are saying...
It should be accepted also, but did you have the multiple choice, because then there could be more than one correct answer and then you must choose ALL correct answer.
It should be acceptable and could be reported if that were the only thing different.
I accidentally pressed the check button when i only had two words written!!!