Problem with pom.xml "Error:java: invalid flag: -release"

Hello,

I work with a project who worked one month ago, I have download it again and now I can’t run it I have this error:
Error:java: invalid flag: -release

I show you my pom.xml in the file

I tried to change the part but nothing changes. I use Intellij Idea and Tomcat 8.0.38
I tried to launch this command too :

mvn vaadin:update-widgetset install
mvn org.apache.maven.plugins:maven-install-plugin:2.5:install-file -Dfile=nextui-0.5.jar

But I receive error :

[code]
[INFO]
 Scanning for projects...
[ERROR]
 [ERROR]
 Some problems were encountered while processing the POMs:
[ERROR]
 Malformed POM C:\Users\mflamant\Documents\Portal\pom.xml: expec
ted START_TAG or END_TAG not TEXT (position: TEXT seen ...<profiles>\r\n\t\t<profile>\r\n\t\t\t
Vaadin pre-release repositories\r\n\t\t\t<i... @262:6)  @ C:\Users\mflamant\Documents\Portal\pom.xml, line 262, column 6
 @
[ERROR]
 The build could not read 1 project -> [Help 1]

[ERROR]

[ERROR]
   The project com.portal:PORTAL:1.0-SNAPSHOT (C:\Users\mflamant\Documents
\Portal\pom.xml) has 1 error
[ERROR]
     Malformed POM C:\Users\mflamant\Documents\Portal\pom.xml: e
xpected START_TAG or END_TAG not TEXT (position: TEXT seen ...<profiles>\r\n\t\t<profile>\r\n\t
\t\tVaadin pre-release repositories\r\n\t\t\t<i... @262:6)  @ C:\Users\mflamant\Documents\Portal\pom.xml, line 262, column 6 -> [Help 2]

[ERROR]

[ERROR]
 To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR]
 Re-run Maven using the -X switch to enable full debug logging.
[ERROR]

[ERROR]
 For more information about the errors and possible solutions, please read the following
 articles:
[ERROR]
 [Help 1]
 http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR]
 [Help 2]
 http://cwiki.apache.org/confluence/display/MAVEN/ModelParseException
[/code]

The line 262 is:
vaadin-prerelease

So I don’t know how to resolve this error. Can you help me ?
Thank you.

Here the file pom.xml
40302.xml (8.27 KB)