VALIDATION PROBLEMS WERE FOUND problem: cvc-enumeration-valid

Exception:
VALIDATION PROBLEMS WERE FOUND problem: cvc-enumeration-valid:
string value '2.4' is not a valid enumeration value for
web-app-versionType in namespace http://java.sun.com/xml/ns/javaee

Solution:
While I was deploying my project on weblogic server 10.3
I had this exception at deploy ear phase. And I have found
the solution as changing the version of my web.xml
 from 2.4 to 2.5.