diff --git a/fe/fe-connector/fe-connector-iceberg/src/test/java/org/apache/doris/connector/iceberg/IcebergWritePlanProviderTest.java b/fe/fe-connector/fe-connector-iceberg/src/test/java/org/apache/doris/connector/iceberg/IcebergWritePlanProviderTest.java
index ad03f8a0a2039b..4e732eecfa59f9 100644
--- a/fe/fe-connector/fe-connector-iceberg/src/test/java/org/apache/doris/connector/iceberg/IcebergWritePlanProviderTest.java
+++ b/fe/fe-connector/fe-connector-iceberg/src/test/java/org/apache/doris/connector/iceberg/IcebergWritePlanProviderTest.java
@@ -1724,8 +1724,11 @@ public void planMergePreservesExplicitlyEmptyReadAcrossConcurrentFirstAppend() {
         providerFor(ops.table, ctx).planWrite(new WriteSession(txn),
                 new WriteHandle(emptyPinnedHandle).writeOperation(WriteOperation.MERGE));
 
-        Assertions.assertNull(txn.getBaseSnapshotId(),
-                "an explicitly empty read must leave RowDelta validation unbounded across the first append");
+        // #66348: an explicitly pinned -1 (the empty-table generation) stays on baseSnapshotId as an
+        // OCC fence — the RowDelta commit validates from the pinned generation, so a concurrent first
+        // append in the read->begin-write window is detected at commit instead of being silently allowed.
+        Assertions.assertEquals(Long.valueOf(-1L), txn.getBaseSnapshotId(),
+                "an explicitly empty read must stay an OCC fence across a concurrent first append");
     }
 
     // ───────────────────────────── MERGE sink (TIcebergMergeSink) ─────────────────────────────
diff --git a/fe/fe-core/src/test/java/org/apache/doris/common/PropertyAnalyzerTest.java b/fe/fe-core/src/test/java/org/apache/doris/common/PropertyAnalyzerTest.java
index 67aaa87bee9ee2..bb27cd7cf134a9 100644
--- a/fe/fe-core/src/test/java/org/apache/doris/common/PropertyAnalyzerTest.java
+++ b/fe/fe-core/src/test/java/org/apache/doris/common/PropertyAnalyzerTest.java
@@ -409,7 +409,12 @@ public void testAnalyzePartitionInvertedIndexFileStorageFormat() throws Analysis
             properties.put(PropertyAnalyzer.PROPERTIES_PARTITION_INVERTED_INDEX_STORAGE_FORMAT, "V1");
             AnalysisException v1Exception = Assertions.assertThrows(AnalysisException.class,
                     () -> PropertyAnalyzer.analyzePartitionInvertedIndexFileStorageFormat(properties));
-            Assertions.assertTrue(v1Exception.getMessage().contains("only supports V2, V3 and SNII"));
+            // #64522 blocks V1 inside analyzeInvertedIndexFileStorageFormat ("deprecated ... use V2") before
+            // the partition-level check ("only supports V2, V3 and SNII") can run; either message rejects V1.
+            Assertions.assertTrue(v1Exception.getMessage().contains("only supports V2, V3 and SNII")
+                    || v1Exception.getMessage().contains(
+                            "Inverted index V1 is deprecated and no longer allowed"),
+                    "V1 must be rejected, got: " + v1Exception.getMessage());
 
             properties.put(PropertyAnalyzer.PROPERTIES_PARTITION_INVERTED_INDEX_STORAGE_FORMAT, "SNII");
             Config.enable_partition_inverted_index_storage_format_rollout = false;