Remove flash object from session Grails -

Remove flash object from session Grails -

i want remove flash object session in grails application. doing

session.removeattribute('org.codehaus.groovy.grails.flash_scope')

in filter throwing next error:

com.hazelcast.nio.serialization.hazelcastserializationexception: java.lang.classnotfoundexception: org.codehaus.groovy.grails.web.servlet.grailsflashscope java.util.concurrent.executionexception: com.hazelcast.nio.serialization.hazelcastserializationexception: java.lang.classnotfoundexception: org.codehaus.groovy.grails.web.servlet.grailsflashscope @ java.util.concurrent.futuretask.report(futuretask.java:122) ~[na:1.7.0_51] @ java.util.concurrent.futuretask.get(futuretask.java:188) ~[na:1.7.0_51]

is there way improve solution removing flash object session?

grails grails-2.4