Last Read Post greater than amount of posts

2013-02-21 20:46:16 [DEBUG][http-8080-41    ][Староверъ][org.jtalks.jcommune.web.exception.PrettyLogExceptionResolver] - Resolving exception from handler [public org.springframework.web.servlet.ModelAndView org.jtalks.jcommune.web.control
ler.BranchController.recentTopicsPage(java.lang.Integer)]: java.lang.IllegalArgumentException: Last read post index is bigger than post count in the topic
2013-02-21 20:46:16 [WARN ][http-8080-41    ][Староверъ][                 org.jtalks.jcommune] - Handler execution resulted in exception
java.lang.IllegalArgumentException: Last read post index is bigger than post count in the topic
        at org.apache.commons.lang.Validate.isTrue(Validate.java:136)
        at org.jtalks.jcommune.model.entity.Topic.setLastReadPostIndex(Topic.java:447)
        at org.jtalks.jcommune.service.transactional.TransactionalLastReadPostService.fillLastReadPostForTopics(TransactionalLastReadPostService.java:60)
        at sun.reflect.GeneratedMethodAccessor307.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
        at $Proxy60.fillLastReadPostForTopics(Unknown Source)
        at org.jtalks.jcommune.web.controller.BranchController.recentTopicsPage(BranchController.java:134)
        at sun.reflect.GeneratedMethodAccessor344.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)