A new session could not be created error is displayed to me

Exception in thread “main” org.openqa.selenium.SessionNotCreatedException: A new session could not be created. (Original error: Requested a new session but one was in progress) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 602.29 seconds
Build info: version: ‘unknown’, revision: ‘unknown’, time: ‘unknown’
System info: host: ‘L-AMM-ZHASAN’, ip: ‘192.168.56.1’, os.name: ‘Windows 7’, os.arch: ‘amd64’, os.version: ‘6.1’, java.version: ‘1.8.0_101’
Driver info: io.appium.java_client.android.AndroidDriver
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:647)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:42)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:247)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:129)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:142)
at io.appium.java_client.DefaultGenericMobileDriver.(DefaultGenericMobileDriver.java:38)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:83)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:93)
at io.appium.java_client.android.AndroidDriver.(AndroidDriver.java:72)
at com.appium.android.LunchApp.main(LunchApp.java:23)

The server from a previous run is still active. You can kill it manually, or make certain your automation closes the server upon exit.