diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 1eb65e2d7..a911a6229 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -2288,9 +2288,6 @@ class basic_json
     {
         assert_invariant();
         m_value.destroy(m_type);
-#if JSON_DIAGNOSTICS
-        m_parent = nullptr;
-#endif
     }
 
     /// @}
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 8987ead4f..50e2581de 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -18924,9 +18924,6 @@ class basic_json
     {
         assert_invariant();
         m_value.destroy(m_type);
-#if JSON_DIAGNOSTICS
-        m_parent = nullptr;
-#endif
     }
 
     /// @}