diff --git a/src/archiver/parent.rs b/src/archiver/parent.rs
index d025f2e..2a7e8fd 100644
--- a/src/archiver/parent.rs
+++ b/src/archiver/parent.rs
@@ -161,8 +161,8 @@ impl<BE: IndexedBackend> Parent<BE> {
                 let parent = self.is_parent(&node, &node.name());
                 let parent = match parent {
                     ParentResult::Matched(p_node) => {
-                        if p_node.content().iter().all(|id| be.has_data(id)) {
-                            node.set_content(p_node.content().to_vec());
+                        if p_node.content.iter().flatten().all(|id| be.has_data(id)) {
+                            node.set_content(p_node.content.iter().flatten().copied().collect());
                             ParentResult::Matched(())
                         } else {
                             warn!(
diff --git a/src/backend/node.rs b/src/backend/node.rs
index 602f92b..12f78a6 100644
--- a/src/backend/node.rs
+++ b/src/backend/node.rs
@@ -124,10 +124,6 @@ impl Node {
         &self.meta
     }
 
-    pub fn content(&self) -> &Vec<Id> {
-        self.content.as_ref().unwrap()
-    }
-
     pub fn subtree(&self) -> &Option<Id> {
         &self.subtree
     }
diff --git a/src/commands/check.rs b/src/commands/check.rs
index 44622e3..dc90502 100644
--- a/src/commands/check.rs
+++ b/src/commands/check.rs
@@ -291,21 +291,26 @@ fn check_snapshots(index: &impl IndexedBackend) -> Result<()> {
         let (path, tree) = item;
         for node in tree.nodes() {
             match node.node_type() {
-                NodeType::File => {
-                    for (i, id) in node.content().iter().enumerate() {
-                        if id.is_null() {
-                            error!("file {:?} blob {} has null ID", path.join(node.name()), i);
-                        }
+                NodeType::File => match &node.content {
+                    Some(content) => {
+                        for (i, id) in content.iter().enumerate() {
+                            if id.is_null() {
+                                error!("file {:?} blob {} has null ID", path.join(node.name()), i);
+                            }
 
-                        if !index.has_data(id) {
-                            error!(
-                                "file {:?} blob {} is missing in index",
-                                path.join(node.name()),
-                                id
-                            );
+                            if !index.has_data(id) {
+                                error!(
+                                    "file {:?} blob {} is missing in index",
+                                    path.join(node.name()),
+                                    id
+                                );
+                            }
                         }
                     }
-                }
+                    None => {
+                        error!("file {:?} doesn't have a content", path.join(node.name()));
+                    }
+                },
 
                 NodeType::Dir => {
                     match node.subtree() {
diff --git a/src/commands/copy.rs b/src/commands/copy.rs
index bf5f714..2d98413 100644
--- a/src/commands/copy.rs
+++ b/src/commands/copy.rs
@@ -127,14 +127,17 @@ fn copy(
             tree.nodes().par_iter().try_for_each(|node| {
                 match node.node_type() {
                     NodeType::File => {
-                        node.content().par_iter().try_for_each(|id| -> Result<_> {
-                            trace!("copy data blob {id}");
-                            if !index_dest.has_data(id) {
-                                let data = index.get_data(id).unwrap().read_data(index.be())?;
-                                data_packer.add(&data, id)?;
-                            }
-                            Ok(())
-                        })?;
+                        node.content
+                            .par_iter()
+                            .flatten()
+                            .try_for_each(|id| -> Result<_> {
+                                trace!("copy data blob {id}");
+                                if !index_dest.has_data(id) {
+                                    let data = index.get_data(id).unwrap().read_data(index.be())?;
+                                    data_packer.add(&data, id)?;
+                                }
+                                Ok(())
+                            })?;
                     }
 
                     NodeType::Dir => {
diff --git a/src/commands/diff.rs b/src/commands/diff.rs
index 801fc78..32fc41e 100644
--- a/src/commands/diff.rs
+++ b/src/commands/diff.rs
@@ -65,7 +65,7 @@ pub(super) fn execute(
                 NodeStreamer::new(index.clone(), &node1)?,
                 NodeStreamer::new(index, &node2)?,
                 opts.no_content,
-                |_path, node1, node2| Ok(node1.content() == node2.content()),
+                |_path, node1, node2| Ok(node1.content == node2.content),
                 opts.metadata,
             )
         }
@@ -133,7 +133,7 @@ fn identical_content_local(
         None => return Ok(false),
     };
 
-    for id in node.content() {
+    for id in node.content.iter().flatten() {
         let ie = index
             .get_data(id)
             .ok_or_else(|| anyhow!("did not find id {} in index", id))?;
diff --git a/src/commands/prune.rs b/src/commands/prune.rs
index 7d07086..5bf5378 100644
--- a/src/commands/prune.rs
+++ b/src/commands/prune.rs
@@ -1109,7 +1109,9 @@ fn find_used_blobs(
         let (_, tree) = item;
         for node in tree.nodes() {
             match node.node_type() {
-                NodeType::File => ids.extend(node.content().iter().map(|id| (*id, 0))),
+                NodeType::File => {
+                    ids.extend(node.content.iter().flatten().map(|id| (*id, 0)));
+                }
                 NodeType::Dir => {
                     ids.insert(node.subtree().unwrap(), 0);
                 }
diff --git a/src/commands/restore.rs b/src/commands/restore.rs
index d9b7b2f..7e4421e 100644
--- a/src/commands/restore.rs
+++ b/src/commands/restore.rs
@@ -548,7 +548,7 @@ impl FileInfos {
         self.names.push(name);
         let mut file_pos = 0;
         let mut has_unmatched = false;
-        for id in file.content().iter() {
+        for id in file.content.iter().flatten() {
             let ie = index
                 .get_data(id)
                 .ok_or_else(|| anyhow!("did not find id {} in index", id))?;