diff --git a/crates/iceberg/src/spec/manifest/_serde.rs b/crates/iceberg/src/spec/manifest/_serde.rs
index 0f15479d95..40e707f62b 100644
--- a/crates/iceberg/src/spec/manifest/_serde.rs
+++ b/crates/iceberg/src/spec/manifest/_serde.rs
@@ -97,7 +97,7 @@ impl ManifestEntryV1 {
 }
 
 #[serde_as]
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, Clone)]
 /// Data file
 pub struct DataFileSerde {
     #[serde(default)]
diff --git a/crates/iceberg/src/transaction/mod.rs b/crates/iceberg/src/transaction/mod.rs
index d79747a8c6..245898a582 100644
--- a/crates/iceberg/src/transaction/mod.rs
+++ b/crates/iceberg/src/transaction/mod.rs
@@ -131,7 +131,8 @@ impl<'a> Transaction<'a> {
         Ok(self)
     }
 
-    fn generate_unique_snapshot_id(&self) -> i64 {
+    /// Generate a new `snapshot_id`.
+    pub fn generate_unique_snapshot_id(&self) -> i64 {
         let generate_random_id = || -> i64 {
             let (lhs, rhs) = Uuid::new_v4().as_u64_pair();
             let snapshot_id = (lhs ^ rhs) as i64;