diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index 8e5a928..2e2d6e9 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -938,12 +938,12 @@ InternalVersionT maxVersion(Node *n) {
     __builtin_unreachable(); // GCOVR_EXCL_LINE
   case Type_Node3: {
     auto *n3 = static_cast<Node3 *>(n);
-    int i = getNodeIndex(n3, index);
+    int i = getNodeIndexExists(n3, index);
     return n3->childMaxVersion[i];
   }
   case Type_Node16: {
     auto *n16 = static_cast<Node16 *>(n);
-    int i = getNodeIndex(n16, index);
+    int i = getNodeIndexExists(n16, index);
     return n16->childMaxVersion[i];
   }
   case Type_Node48: {
@@ -971,12 +971,12 @@ InternalVersionT exchangeMaxVersion(Node *n, InternalVersionT newMax) {
     __builtin_unreachable(); // GCOVR_EXCL_LINE
   case Type_Node3: {
     auto *n3 = static_cast<Node3 *>(n);
-    int i = getNodeIndex(n3, index);
+    int i = getNodeIndexExists(n3, index);
     return std::exchange(n3->childMaxVersion[i], newMax);
   }
   case Type_Node16: {
     auto *n16 = static_cast<Node16 *>(n);
-    int i = getNodeIndex(n16, index);
+    int i = getNodeIndexExists(n16, index);
     return std::exchange(n16->childMaxVersion[i], newMax);
   }
   case Type_Node48: {
@@ -1005,13 +1005,13 @@ void setMaxVersion(Node *n, InternalVersionT newMax) {
     __builtin_unreachable(); // GCOVR_EXCL_LINE
   case Type_Node3: {
     auto *n3 = static_cast<Node3 *>(n);
-    int i = getNodeIndex(n3, index);
+    int i = getNodeIndexExists(n3, index);
     n3->childMaxVersion[i] = newMax;
     return;
   }
   case Type_Node16: {
     auto *n16 = static_cast<Node16 *>(n);
-    int i = getNodeIndex(n16, index);
+    int i = getNodeIndexExists(n16, index);
     n16->childMaxVersion[i] = newMax;
     return;
   }