事务失败错误: transaction already commit

示例代码：

const transaction = await db.startTransaction()
try{
//写数据库代码略.........
await transaction.commit()
console.log(transaction succeeded)
return {
success: true,
order_no: order_no,
total_fee:orderHead.total_fee
}
}catch(e) {
await transaction.rollback()
console.error(transaction error, e)
return {
success: false,
error: e
}
}
//控制台结果,已经打印出 transaction succeeded，却抛出事务失败？
10:18:55.087 [本地调试]transaction succeeded uniCloud-aliyun/cloudfunctions
10:18:55.090 [本地调试]Error: 事务失败错误: transaction already commit
10:18:55.090 [本地调试] at new Promise (<anonymous>)

操作步骤：

const transaction = await db.startTransaction()
try{
//写数据库代码略.........
await transaction.commit()
console.log(transaction succeeded)
return {
success: true,
order_no: order_no,
total_fee:orderHead.total_fee
}
}catch(e) {
await transaction.rollback()
console.error(transaction error, e)
return {
success: false,
error: e
}
}
//控制台结果,已经打印出 transaction succeeded，却抛出事务失败？
10:18:55.087 [本地调试]transaction succeeded uniCloud-aliyun/cloudfunctions
10:18:55.090 [本地调试]Error: 事务失败错误: transaction already commit
10:18:55.090 [本地调试] at new Promise (<anonymous>)

预期结果：

return {
success: true,
order_no: order_no,
total_fee:orderHead.total_fee
}

实际结果：

return {
success: false,
error: e
}