diff --git a/gix/src/submodule/mod.rs b/gix/src/submodule/mod.rs
index ff88f3b439b..6ebe3f07118 100644
--- a/gix/src/submodule/mod.rs
+++ b/gix/src/submodule/mod.rs
@@ -10,7 +10,7 @@ use std::{
 use gix_odb::FindExt;
 pub use gix_submodule::*;
 
-use crate::{bstr::BStr, ext::ObjectIdExt, repository::IndexPersistedOrInMemory, Id, Repository, Submodule};
+use crate::{bstr::BStr, repository::IndexPersistedOrInMemory, Repository, Submodule};
 
 pub(crate) type ModulesFileStorage = gix_features::threading::OwnShared<gix_fs::SharedFileSnapshotMut<File>>;
 /// A lazily loaded and auto-updated worktree index.
@@ -164,13 +164,9 @@ impl<'repo> Submodule<'repo> {
     /// If `None`, but `Some()` when calling [`Self::head_id()`], then the submodule was just deleted but the change
     /// wasn't yet committed.
     /// If `Some()`, but `None` when calling [`Self::head_id()`], then the submodule was just added without having committed the change.
-    pub fn index_id(&self) -> Result<Option<Id<'repo>>, index_id::Error> {
+    pub fn index_id(&self) -> Result<Option<gix_hash::ObjectId>, index_id::Error> {
         let path = self.path()?;
-        Ok(self
-            .state
-            .index()?
-            .entry_by_path(&path)
-            .map(|entry| entry.id.attach(self.state.repo)))
+        Ok(self.state.index()?.entry_by_path(&path).map(|entry| entry.id))
     }
 
     /// Return the object id of the submodule as stored in `HEAD^{tree}` of the superproject, or `None` if it wasn't yet committed.
@@ -178,7 +174,7 @@ impl<'repo> Submodule<'repo> {
     /// If `Some()`, but `None` when calling [`Self::index_id()`], then the submodule was just deleted but the change
     /// wasn't yet committed.
     /// If `None`, but `Some()` when calling [`Self::index_id()`], then the submodule was just added without having committed the change.
-    pub fn head_id(&self) -> Result<Option<Id<'repo>>, head_id::Error> {
+    pub fn head_id(&self) -> Result<Option<gix_hash::ObjectId>, head_id::Error> {
         let path = self.path()?;
         Ok(self
             .state
@@ -186,7 +182,7 @@ impl<'repo> Submodule<'repo> {
             .head_commit()?
             .tree()?
             .peel_to_entry_by_path(gix_path::from_bstr(path.as_ref()))?
-            .map(|entry| entry.id()))
+            .map(|entry| entry.inner.oid))
     }
 
     /// Return the path at which the repository of the submodule should be located.
diff --git a/gix/tests/repository/submodule.rs b/gix/tests/repository/submodule.rs
index b83990074c9..0d855885d23 100644
--- a/gix/tests/repository/submodule.rs
+++ b/gix/tests/repository/submodule.rs
@@ -58,7 +58,7 @@ mod modules_file {
 }
 
 mod submodules {
-    use gix::{bstr::BString, Id};
+    use gix::bstr::BString;
 
     use crate::{submodule::repo, util::hex_to_id};
 
@@ -72,8 +72,8 @@ mod submodules {
                 .map(|sm| (
                     sm.name().to_owned(),
                     sm.path().expect("valid path").into_owned(),
-                    sm.head_id().expect("valid").map(Id::detach),
-                    sm.index_id().expect("valid").map(Id::detach),
+                    sm.head_id().expect("valid"),
+                    sm.index_id().expect("valid"),
                     sm.is_active().expect("no config error")
                 ))
                 .collect::<Vec<_>>(),