diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index b8c0ab6e8..5ab1d2cd1 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -433,7 +433,8 @@ void CConfigManager::handleMonitor(const std::string& command, const std::string
             return;
         }
 
-        m_dMonitorRules.erase(std::remove_if(m_dMonitorRules.begin(), m_dMonitorRules.end(), [&](const auto& other) { return other.name == newrule.name; }));
+        if (std::find_if(m_dMonitorRules.begin(), m_dMonitorRules.end(), [&](const auto& other) { return other.name == newrule.name; }) != m_dMonitorRules.end()) 
+            m_dMonitorRules.erase(std::remove_if(m_dMonitorRules.begin(), m_dMonitorRules.end(), [&](const auto& other) { return other.name == newrule.name; }));
 
         m_dMonitorRules.push_back(newrule);
 
@@ -468,7 +469,8 @@ void CConfigManager::handleMonitor(const std::string& command, const std::string
         return;
     }
 
-    m_dMonitorRules.erase(std::remove_if(m_dMonitorRules.begin(), m_dMonitorRules.end(), [&](const auto& other) { return other.name == newrule.name; }));
+    if (std::find_if(m_dMonitorRules.begin(), m_dMonitorRules.end(), [&](const auto& other) { return other.name == newrule.name; }) != m_dMonitorRules.end())
+        m_dMonitorRules.erase(std::remove_if(m_dMonitorRules.begin(), m_dMonitorRules.end(), [&](const auto& other) { return other.name == newrule.name; }));
 
     m_dMonitorRules.push_back(newrule);
 }