conversation_module: update only if information are up to date

Change-Id: Ic62588f1c759993192d076cf979ad51904974273

src/jamidht/conversation_module.cpp

@@ -2112,6 +2112,9 @@ ConversationModule::onSyncData(const SyncMsg& msg,
 
         auto conv = pimpl_->startConversation(convInfo);
         std::unique_lock<std::mutex> lk(conv->mtx);
+        auto update = std::max(convInfo.created, convInfo.removed) >= std::max(conv->info.created, conv->info.removed);
+        if (!update)
+            continue;
         if (not convInfo.isRemoved()) {
             // If multi devices, it can detect a conversation that was already
             // removed, so just check if the convinfo contains a removed conv