------Error Stack Begin------
StatusCodeError: 422 - {"message":"Invalid request.\n\n\"sha\" wasn't supplied.","documentation_url":"https://docs.github.com/rest/reference/repos#create-or-update-file-contents"}
    at new StatusCodeError (E:\Program Files\PicGo\resources\app.asar\node_modules\request-promise-core\lib\errors.js:32:15)
    at Request.plumbing.callback (E:\Program Files\PicGo\resources\app.asar\node_modules\request-promise-core\lib\plumbing.js:104:33)
    at Request.RP$callback [as _callback] (E:\Program Files\PicGo\resources\app.asar\node_modules\request-promise-core\lib\plumbing.js:46:31)
    at Request.self.callback (E:\Program Files\PicGo\resources\app.asar\node_modules\request\request.js:185:22)
    at Request.emit (events.js:200:13)
    at Request.<anonymous> (E:\Program Files\PicGo\resources\app.asar\node_modules\request\request.js:1154:10)
    at Request.emit (events.js:200:13)
    at IncomingMessage.<anonymous> (E:\Program Files\PicGo\resources\app.asar\node_modules\request\request.js:1076:12)
    at Object.onceWrapper (events.js:288:20)
    at IncomingMessage.emit (events.js:205:15)
-------Error Stack End------- 

出现此问题是由于出现了同名文件，将上传的图片名字修改即可