diff -U3 /Users/admin/pgsql/src/test/regress/expected/generated_stored.out /Users/admin/pgsql/build/testrun/pg_upgrade/002_pg_upgrade/data/results/generated_stored.out
--- /Users/admin/pgsql/src/test/regress/expected/generated_stored.out	2026-01-15 01:44:31
+++ /Users/admin/pgsql/build/testrun/pg_upgrade/002_pg_upgrade/data/results/generated_stored.out	2026-01-15 01:47:37
@@ -1311,6 +1311,7 @@
 CREATE TABLE gtest30_1 () INHERITS (gtest30);
 ALTER TABLE ONLY gtest30 ALTER COLUMN b DROP EXPRESSION;  -- error
 ERROR:  ALTER TABLE / DROP EXPRESSION must be applied to child tables too
+HINT:  Do not specify the ONLY keyword.
 \d gtest30
                     Table "generated_stored_tests.gtest30"
  Column |  Type   | Collation | Nullable |              Default               
diff -U3 /Users/admin/pgsql/src/test/regress/expected/generated_virtual.out /Users/admin/pgsql/build/testrun/pg_upgrade/002_pg_upgrade/data/results/generated_virtual.out
--- /Users/admin/pgsql/src/test/regress/expected/generated_virtual.out	2026-01-15 01:44:31
+++ /Users/admin/pgsql/build/testrun/pg_upgrade/002_pg_upgrade/data/results/generated_virtual.out	2026-01-15 01:47:41
@@ -1281,6 +1281,7 @@
 CREATE TABLE gtest30_1 () INHERITS (gtest30);
 ALTER TABLE ONLY gtest30 ALTER COLUMN b DROP EXPRESSION;  -- error
 ERROR:  ALTER TABLE / DROP EXPRESSION must be applied to child tables too
+HINT:  Do not specify the ONLY keyword.
 \d gtest30
                 Table "generated_virtual_tests.gtest30"
  Column |  Type   | Collation | Nullable |           Default