It must have been stored for a long time without gas. Basketball is more prone to aging and cracking under pressure. The storage time may also be related to the materials used, such as leather, rubber and PU leather. However, no matter what material is used, the basketball leather will age with time and feel worse. I have seen a basketball in CBA that has not been used and signed by the coach for a long time. However, basketball itself is a low-value consumable, and it is reasonable to eliminate it after the friction feels worse.