I had 2 webparts in my solution. But when i tried to add the 3rd webpart, it successfully adds. But after that "gulp serve" fails. Below is the error message
D:\Bloom\Code\BloomWebparts>gulp serve
Build target: DEBUG
D:\Bloom\Code\BloomWebparts\node_modules\@microsoft\sp-build-web\node_modules\@m icrosoft\node-core-library\lib\JsonSchema.js:178 throw new Error(prefix + os.EOL + ^
Error: JSON validation failed: D:\Bloom\Code\BloomWebparts\config\tslint.json
Error: #/ (Defines configuration options for the...) Additional properties not allowed: lintConfig,useDefaultConfigAsBase,remo veExistingRules,displayAsWarning at validateObjectWithCallback (D:\Bloom\Code\BloomWebparts\node_modules\@mic rosoft\sp-build-web\node_modules\@microsoft\node-core-library\lib\JsonSchema.js: 178:19) at JsonSchema.validateObjectWithCallback (D:\Bloom\Code\BloomWebparts\node_m odules\@microsoft\sp-build-web\node_modules\@microsoft\node-core-library\lib\Jso nSchema.js:193:13) at JsonSchema.validateObject (D:\Bloom\Code\BloomWebparts\node_modules\@micr osoft\sp-build-web\node_modules\@microsoft\node-core-library\lib\JsonSchema.js:1 75:14) at TslintCmdTask._readConfigFile (D:\Bloom\Code\BloomWebparts\node_modules\@ microsoft\sp-build-web\node_modules\@microsoft\gulp-core-build\lib\tasks\GulpTas k.js:308:28) at TslintCmdTask.onRegister (D:\Bloom\Code\BloomWebparts\node_modules\@micro soft\sp-build-web\node_modules\@microsoft\gulp-core-build\lib\tasks\GulpTask.js: 87:32) at Object.initialize (D:\Bloom\Code\BloomWebparts\node_modules\@microsoft\sp -build-web\node_modules\@microsoft\gulp-core-build\lib\index.js:299:24) at SPWebBuildRig.initialize (D:\Bloom\Code\BloomWebparts\node_modules\@micro soft\sp-build-web\node_modules\@microsoft\sp-build-common\lib\BuildRig.js:61:19)
at SPWebBuildRig.initialize (D:\Bloom\Code\BloomWebparts\node_modules\@micro
soft\sp-build-web\node_modules\@microsoft\sp-build-common\lib\SPBuildRig.js:22:1 5) at SPWebBuildRig.initialize (D:\Bloom\Code\BloomWebparts\node_modules\@micro soft\sp-build-web\lib\SPWebBuildRig.js:15:15) at Object.exports.initialize (D:\Bloom\Code\BloomWebparts\node_modules\@micr osoft\sp-build-web\lib\index.js:23:17) at Object. (D:\Bloom\Code\BloomWebparts\gulpfile.js:7:7) at Module._compile (module.js:652:30) at Object.Module._extensions..js (module.js:663:10) at Module.load (module.js:565:32) at tryModuleLoad (module.js:505:12) at Function.Module._load (module.js:497:3)
D:\Bloom\Code\BloomWebparts>
Any idea why this happens?