vue.js:634 [Vue warn]: Duplicate keys detected: '1589184367171'. This may cause an update error报错

1. vue.js:634 [Vue warn]: Duplicate keys detected: ‘1589184367171’. This may cause an update error报错 错误原因： 循环里的key值不是字符串类型。可更替key值或者强制转换成字符串类型

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