diff --git a/src/common/model/diagram_element.cc b/src/common/model/diagram_element.cc
index 5b25c150..3f4fced1 100644
--- a/src/common/model/diagram_element.cc
+++ b/src/common/model/diagram_element.cc
@@ -24,8 +24,6 @@
 
 namespace clanguml::common::model {
 
-std::atomic_uint64_t diagram_element::m_nextId = 1;
-
 diagram_element::diagram_element() = default;
 
 diagram_element::id_t diagram_element::id() const { return id_; }
diff --git a/src/common/model/diagram_element.h b/src/common/model/diagram_element.h
index 2553f87c..0390b3a6 100644
--- a/src/common/model/diagram_element.h
+++ b/src/common/model/diagram_element.h
@@ -82,7 +82,5 @@ private:
     std::vector<relationship> relationships_;
     bool nested_{false};
     bool complete_{false};
-
-    static std::atomic_uint64_t m_nextId;
 };
 } // namespace clanguml::common::model
diff --git a/src/main.cc b/src/main.cc
index cb86e220..aabfccb8 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -42,7 +42,7 @@
 
 #ifndef NDEBUG
 namespace backward {
-backward::SignalHandling sh;
+backward::SignalHandling sh; // NOLINT
 } // namespace backward
 #endif