TI-API: 使用测试产品码能够获取信息，换一个获取不到信息

https://transact.ti.com/v2/store/products?gpn=ISO7640FMDW&currency=USD&exclude-evms=true&page=0&size=20

用系统给的例子中的产品编号AFE7799

获取的结果为{"content":[{"tiPartNumber":"AFE7799IABJ","genericPartNumber":"AFE7799","buyNowUrl":"https://www.ti.com/product/AFE7799/part-details/AFE7799IABJ",
"quantity":153,"limit":10,"inventory":[],"pricing":[{"currency":"USD","priceBreaks":[{"priceBreakQuantity":1,"price":729.928},{"priceBreakQuantity":100,"price":660.71},
{"priceBreakQuantity":250,"price":641.833},{"priceBreakQuantity":1000,"price":629.248}]}],"description":"Quad-channel RF transceiver with dual feedback paths",
"minimumOrderQuantity":1,"standardPackQuantity":90,"exportControlClassificationNumber":"5A991B","htsCode":"8542390001","pinCount":400,"packageType":"AFE7799IABJ_400_FCBGA_ABJ",
"packageCarrier":"TRAY","customReel":false,"lifeCycle":"ACTIVE"}],"first":true,"last":true,"totalPages":1,"totalElements":1,"numberOfElements":1,"size":20,"number":0}


当用产品编号 ISO7640FMDW 获取的结果为{"content":[],"first":true,"last":true,"totalPages":0,"totalElements":0,"numberOfElements":0,"size":20,"number":0}；
但是我在TI商城是能查看到ISO7640FMDW的信息

请帮忙分析一下原因，谢谢！