keytool error: java.lang.Exception: Key pair not generated, alias <tomcat> already exists code example

Example: keytool error: java.lang.Exception: Key pair not generated, alias already exists

keytool -genkey -v -keystore debug.keystore C:\Users\abc\.android\debug.keystore -storepass android -alias androiddebugkey -keypass android -keyalg RSA -keysize 2048 -validity 10000