Facing issue on running first test case

[AndroidDriver] Error: The desired should not include both of an ‘appPackage’ and a ‘browserName’
[AndroidDriver] at Object.wrappedLogger.errorAndThrow (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-support/lib/logging.js:78:13)
[AndroidDriver] at Object.errorAndThrow [as validateDesiredCaps] (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-android-driver/lib/android-helpers.js:759:14)
[AndroidDriver] at AndroidDriver.validateDesiredCaps (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-android-driver/lib/driver.js:496:20)
[AndroidDriver] at AndroidDriver.validateDesiredCaps [as createSession] (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/basedriver/commands/session.js:45:8)
[AndroidDriver] at AndroidDriver.createSession (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-android-driver/lib/driver.js:64:43)
[AndroidDriver] at AppiumDriver.createSession (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/lib/appium.js:301:43)
[AndroidDriver] at process._tickCallback (internal/process/next_tick.js:68:7)
[AndroidDriver] Shutting down Android driver