diff --git a/crates/loro-internal/src/state/container_store/container_wrapper.rs b/crates/loro-internal/src/state/container_store/container_wrapper.rs
index 1daa684f..e36f1cd8 100644
--- a/crates/loro-internal/src/state/container_store/container_wrapper.rs
+++ b/crates/loro-internal/src/state/container_store/container_wrapper.rs
@@ -115,6 +115,7 @@ impl ContainerWrapper {
         ans
     }
 
+    #[allow(unused)]
     pub fn decode_parent(b: &[u8]) -> Option<ContainerID> {
         let mut bytes = &b[1..];
         let _depth = leb128::read::unsigned(&mut bytes).unwrap();