diff --git a/pttodoest/src/main.rs b/pttodoest/src/main.rs
index a1dd691..55cfeff 100755
--- a/pttodoest/src/main.rs
+++ b/pttodoest/src/main.rs
@@ -167,7 +167,9 @@ impl File {
 
     pub fn stage_persisted(&self) -> Result<(), String> {
         let persisted_as_snapshot = self.events()?.snapshot()?;
-        self.append(Delta::snapshot(persisted_as_snapshot.clone()))?;
+        if persisted_as_snapshot != self.events()?.last_snapshot() {
+            self.append(Delta::snapshot(persisted_as_snapshot.clone()))?;
+        }
         let plaintext = serde_yaml::to_string(&persisted_as_snapshot).unwrap();
         let mut f = std::fs::File::create(&self.file).expect("failed to open file for writing");
         writeln!(f, "{}", plaintext).expect("failed to write");