mbaedke commented on code in PR #1146:
URL: https://github.com/apache/jackrabbit-oak/pull/1146#discussion_r1363607487


##########
oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/version/VersionableState.java:
##########
@@ -285,8 +287,32 @@ private void restoreFrozen(@NotNull NodeBuilder frozen,
                                @NotNull NodeBuilder dest,
                                @NotNull VersionSelector selector)
             throws RepositoryException, CommitFailedException {
-        // 15.7.2 Restoring Type and Identifier
-        restoreFrozenTypeAndUUID(frozen, dest);
+        //OAK-9459: if the NodeState is not empty, retrieve OPVs before 
restoring types to avoid constraint violations
+        boolean frozenTypeRestored = false;
+        if (!dest.hasProperty(JCR_PRIMARYTYPE)) {
+            // empty NodeState
+            // 15.7.2 Restoring Type and Identifier
+            restoreFrozenTypeAndUUID(frozen, dest);
+            frozenTypeRestored = true;
+        }
+        HashMap<PropertyState, Integer> opvs = new HashMap<>();
+        for (PropertyState p : dest.getProperties()) {
+            String propName = p.getName();
+            if (BASIC_PROPERTIES.contains(propName)) {
+                continue;

Review Comment:
   I don't care, so I'll remove the continue and and I think we should also 
turn the if-else if sequence into a switch.



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