该错误通常是由于使用的AWS密钥没有足够的权限来执行所需的操作而引起的。要解决此问题，请确保您的AWS密钥具有适当的权限访问和修改指定的S3存储桶。

以下是使用AWS SDK Go V2来上传对象时，如何设置访问密钥和桶权限的示例代码：

package main

import (
    "context"
    "fmt"
    "os"

    "github.com/aws/aws-sdk-go-v2/config"
    "github.com/aws/aws-sdk-go-v2/service/s3"
    "github.com/aws/aws-sdk-go-v2/feature/s3/manager"
)

func main() {

    // 配置 AWS SDK
    cfg, err := config.LoadDefaultConfig(context.TODO())
    if err != nil {
        fmt.Fprintf(os.Stderr, "failed to load configuration, %v\n", err)
        os.Exit(1)
    }

    // 创建 Amazon S3 服务客户端
    client := s3.NewFromConfig(cfg)

    // 对象存储桶名称
    bucketName := "my-bucket"

    // 对象键
    objectKey := "my-object"

    // 对象内容
    objectContent := []byte("Hello, world!")

    // 配置上传对象选项
    uploader := manager.NewUploader(client)

    _, err = uploader.Upload(context.TODO(), &s3.PutObjectInput{
        Bucket: &bucketName,
        Key:    &objectKey,
        Body:   bytes.NewReader(objectContent),

        // 设置桶ACL
        ACL: s3.ObjectCannedACLPublicRead,

        // 设置访问密钥
        AccessControlTranslation: &s3.AccessControlTranslation{
            Owner: s3.OwnerOverride,
        },
    })

    if err != nil {
        fmt.Fprintf(os.Stderr, "failed to upload object, %v\n", err)
        os.Exit(1)
    }

    fmt.Println("object uploaded successfully!")
}