diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index 7004be4..499f1cf 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -2779,21 +2779,22 @@ Node **insert(Node **self, std::span<const uint8_t> key,
       return self;
     }
 
-    auto &child = getOrCreateChild(*self, key.front(), writeVersion, tls);
+    int index = key.front();
+    key = key.subspan(1, key.size() - 1);
+    auto &child = getOrCreateChild(*self, index, writeVersion, tls);
     if (!child) {
-      child = tls->allocate<Node0>(key.size() - 1);
+      child = tls->allocate<Node0>(key.size());
       child->numChildren = 0;
       child->entryPresent = false;
-      child->partialKeyLen = key.size() - 1;
+      child->partialKeyLen = key.size();
       child->parent = *self;
-      child->parentsIndex = key.front();
+      child->parentsIndex = index;
       setMaxVersion(child, impl, writeVersion);
-      memcpy(child->partialKey(), key.data() + 1, child->partialKeyLen);
+      memcpy(child->partialKey(), key.data(), child->partialKeyLen);
       return &child;
     }
 
     self = &child;
-    key = key.subspan(1, key.size() - 1);
 
     if ((*self)->partialKeyLen > 0) {
       consumePartialKey(*self, key, writeVersion, tls);