Error on line 2 at column 6: XML declaration allowed only at the start of the document

问题复现：在一台新的电脑配置阿里云maven远程仓库时，在IDEA导入setting.xml，发现配置不生效，在浏览器打开setting.xml发现如下报错：error on line 2 at column 6: XML declaration allowed only at the …

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