Magento2在使用api更新库存的时候，失败了出现下面情况
The stock item was unable to be saved. Please try again
解决办法：
- rm -rf generated/*
- php bin/magento indexer:reset
- php bin/magento indexer:reindex
- php bin/magento cache:clean
执行完上面的命令再次更新库存。
Magento2 The stock item was unable to be saved. Please try again