diff --git a/spark/v4.1/spark/src/main/java/org/apache/iceberg/spark/source/BaseSparkScanBuilder.java b/spark/v4.1/spark/src/main/java/org/apache/iceberg/spark/source/BaseSparkScanBuilder.java
index ec72a1505a66..be34eaeed5dc 100644
--- a/spark/v4.1/spark/src/main/java/org/apache/iceberg/spark/source/BaseSparkScanBuilder.java
+++ b/spark/v4.1/spark/src/main/java/org/apache/iceberg/spark/source/BaseSparkScanBuilder.java
@@ -230,7 +230,7 @@ private Optional<Types.NestedField> findPartitionField(List<Types.NestedField> f
   // collects used data field IDs across all known table schemas
   private Set<Integer> allUsedFieldIds() {
     return table.schemas().values().stream()
-        .flatMap(tableSchema -> TypeUtil.getProjectedIds(tableSchema.asStruct()).stream())
+        .flatMap(tableSchema -> TypeUtil.indexById(tableSchema.asStruct()).keySet().stream())
         .collect(Collectors.toSet());
   }
 
diff --git a/spark/v4.1/spark/src/test/java/org/apache/iceberg/spark/source/TestSparkMetadataColumns.java b/spark/v4.1/spark/src/test/java/org/apache/iceberg/spark/source/TestSparkMetadataColumns.java
index 68f6f17aaed5..7498f129b21b 100644
--- a/spark/v4.1/spark/src/test/java/org/apache/iceberg/spark/source/TestSparkMetadataColumns.java
+++ b/spark/v4.1/spark/src/test/java/org/apache/iceberg/spark/source/TestSparkMetadataColumns.java
@@ -343,6 +343,88 @@ public void testRowLineageColumnsResolvedInV3OrHigher() {
     }
   }
 
+  @TestTemplate
+  public void testPartitionMetadataColumnWithMapColumn() throws IOException {
+    assumeThat(fileFormat).isEqualTo(FileFormat.PARQUET);
+    assumeThat(formatVersion).isGreaterThanOrEqualTo(2);
+
+    Schema mapSchema =
+        new Schema(
+            Types.NestedField.required(1, "id", Types.LongType.get()),
+            Types.NestedField.required(2, "ts", Types.LongType.get()),
+            Types.NestedField.optional(
+                3,
+                "tags",
+                Types.MapType.ofOptional(4, 5, Types.StringType.get(), Types.StringType.get())));
+    PartitionSpec bucketSpec = PartitionSpec.builderFor(mapSchema).bucket("id", 1).build();
+
+    Map<String, String> properties = Maps.newHashMap();
+    properties.put(FORMAT_VERSION, String.valueOf(formatVersion));
+    properties.put(DEFAULT_FILE_FORMAT, FileFormat.PARQUET.name());
+    properties.put(PARQUET_VECTORIZATION_ENABLED, String.valueOf(vectorized));
+    // merge-on-read: DELETE writes position delete files instead of rewriting data files.
+    // This routes through SupportsDelta which adds _partition to the scan projection.
+    properties.put("write.delete.mode", "merge-on-read");
+
+    String mapTableName = "test_map_partition_collision";
+    TestTables.create(
+        Files.createTempDirectory(temp, "junit").toFile(),
+        mapTableName,
+        mapSchema,
+        bucketSpec,
+        properties);
+
+    // Both rows in a single INSERT so they land in the same Parquet file.
+    // With both rows sharing a file, Spark uses merge-on-read which adds _partition to the scan
+    // projection.
+    sql(
+        "INSERT INTO TABLE %s VALUES (1, 1000, map('env', 'prod')), (2, 9999999999999999, map('env', 'dev'))",
+        mapTableName);
+
+    sql("DELETE FROM %s WHERE ts < 9999999999999999", mapTableName);
+    assertThat(sql("SELECT id, _partition FROM %s", mapTableName)).hasSize(1);
+  }
+
+  @TestTemplate
+  public void testPartitionMetadataColumnWithListColumn() throws IOException {
+    assumeThat(fileFormat).isEqualTo(FileFormat.PARQUET);
+    assumeThat(formatVersion).isGreaterThanOrEqualTo(2);
+
+    Schema listSchema =
+        new Schema(
+            Types.NestedField.required(1, "id", Types.LongType.get()),
+            Types.NestedField.required(2, "ts", Types.LongType.get()),
+            Types.NestedField.optional(
+                3, "tags", Types.ListType.ofOptional(4, Types.StringType.get())));
+    PartitionSpec bucketSpec = PartitionSpec.builderFor(listSchema).bucket("id", 1).build();
+
+    Map<String, String> properties = Maps.newHashMap();
+    properties.put(FORMAT_VERSION, String.valueOf(formatVersion));
+    properties.put(DEFAULT_FILE_FORMAT, FileFormat.PARQUET.name());
+    properties.put(PARQUET_VECTORIZATION_ENABLED, String.valueOf(vectorized));
+    // merge-on-read: DELETE writes position delete files instead of rewriting data files.
+    // This routes through SupportsDelta which adds _partition to the scan projection.
+    properties.put("write.delete.mode", "merge-on-read");
+
+    String listTableName = "test_list_partition_collision";
+    TestTables.create(
+        Files.createTempDirectory(temp, "junit").toFile(),
+        listTableName,
+        listSchema,
+        bucketSpec,
+        properties);
+
+    // Both rows in a single INSERT so they land in the same Parquet file.
+    // With both rows sharing a file, Spark uses merge-on-read which adds _partition to the scan
+    // projection.
+    sql(
+        "INSERT INTO TABLE %s VALUES (1, 1000, array('prod')), (2, 9999999999999999, array('dev'))",
+        listTableName);
+
+    sql("DELETE FROM %s WHERE ts < 9999999999999999", listTableName);
+    assertThat(sql("SELECT id, _partition FROM %s", listTableName)).hasSize(1);
+  }
+
   private void createAndInitTable() throws IOException {
     Map<String, String> properties = Maps.newHashMap();
     properties.put(FORMAT_VERSION, String.valueOf(formatVersion));