这是由于在应用升级后，签名密钥没有变化所导致的错误。解决这个问题的方法是，在升级时使用新的签名密钥。在使用Android Studio进行签名时，可以通过在Gradle中设置签名密钥来实现。示例代码如下： def keystoreProperties = new Properties() def keystorePropertiesFile = rootProject.file('xxxxx.properties') if (keystorePropertiesFile.exists()) { keystoreProperties.load(new FileInputStream(keystorePropertiesFile)) } android { compileSdkVersion xxx buildToolsVersion xxx defaultConfig { applicationId xxxxx.xxxxx" minSdkVersion xxx targetSdkVersion xxx versionCode xxx versionName "x.x.x" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" signingConfigs { release { storeFile file(keystoreProperties['storeFile']) storePassword keystoreProperties['storePassword'] keyAlias keystoreProperties['keyAlias'] keyPassword keystoreProperties['keyPassword'] } } } buildTypes { release { signingConfig signingConfigs.release minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } }"