I tried to browse my site, and got this error

Server Error in '/' Application.

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive. Source Error:

An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Source File: G:\PleskVhosts\quirver.com\httpdocs\web.config    Line: 25

this is my line 25

 <customErrors mode="Off"/>
     <sessionState mode="InProc" cookieless="false" timeout="30" />
    <compilation debug="true" targetFramework="4.5.2" />

What should I do?