要解决这个问题，可以使用AWS CLI命令来手动删除S3中的文件。以下是一个可以在Node.js中使用的示例代码：

const AWS = require('aws-sdk');

AWS.config.update({ region: 'your-region' });

const amplify = new AWS.Amplify();

async function deleteFileFromS3() {
  try {
    const listJobsResponse = await amplify.listJobs({ appId: 'your-app-id' }).promise();
    const jobId = listJobsResponse.jobSummaries[0].jobId; // 获取最新的jobId

    const getJobResponse = await amplify.getJob({ appId: 'your-app-id', jobId }).promise();
    const jobIdData = getJobResponse.job;

    const jobIdArtifacts = jobIdData.artifacts; // 获取jobId的artifacts

    for (const artifact of jobIdArtifacts) {
      if (artifact.artifactType === 'S3') {
        const s3Bucket = artifact.artifactId.split('/')[0];
        const s3Key = artifact.artifactId.split('/')[1];

        const s3 = new AWS.S3();
        const deleteObjectParams = {
          Bucket: s3Bucket,
          Key: s3Key
        };

        await s3.deleteObject(deleteObjectParams).promise();
        console.log(`Deleted file: ${artifact.artifactId}`);
      }
    }

    console.log('All files deleted successfully from S3.');
  } catch (error) {
    console.error('Error deleting files from S3:', error);
  }
}

deleteFileFromS3();

上面的代码首先使用AWS Amplify SDK获取最新的jobId和该job的artifacts。然后，它循环遍历artifacts数组并检查文件类型是否为S3。如果是S3文件，它会使用AWS S3 SDK删除文件。最后，它会打印出已删除的文件列表。

请确保将your-region替换为正确的AWS区域，your-app-id替换为正确的Amplify应用程序ID，并根据需要自定义代码。