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+## Summary
+<!--Explain briefly what goes wrong and explain why you believe this is a bug and not the intended behavior of SQLite (if it is not a crash).-->**No review yet**
+
+## Minimized query
+
+```sql
+CREATE TABLE T1 (
+  A VARCHAR(octet_length('')),
+  X VARCHAR(10),
+  PRIMARY KEY (A, X),
+  UNIQUE (X)
+);
+CREATE TABLE T2 (
+  A VARCHAR(20),
+  Y VARCHAR(10) UNIQUE,
+  PRIMARY KEY (A, Y)
+);
+INSERT INTO T1 VALUES ('a', 'm');
+INSERT INTO T1 VALUES ('b', 'n');
+INSERT INTO T2 VALUES ('b', 'k');
+SELECT A FROM T1 UNION ALL SELECT A FROM T2 ORDER BY A;
+UPDATE T2 SET Y = Y + 1 WHERE rowid = 1;
+```
+
+## Actual output
+
+```sql
+3.39.0 2022-05-10 23:28:12 764b71267e0b31ff7eaf2a0def7526a1a02dce4d5b456dea060d97ed342ealt1
+```
+
+## Expectation
+
+```sql
+3.51.1 2025-11-28 17:28:25 281fc0e9afc38674b9b0991943b9e9d1e64c6cbdb133d35f6f5c87ff6af38a88 (64-bit)
+```
+
+## Flag
+
+```
+-version
+```
+