diff --git a/src/Storages/MergeTree/IMergeTreeDataPart.cpp b/src/Storages/MergeTree/IMergeTreeDataPart.cpp
index ea7bc0d4db5..9da12a2dca2 100644
--- a/src/Storages/MergeTree/IMergeTreeDataPart.cpp
+++ b/src/Storages/MergeTree/IMergeTreeDataPart.cpp
@@ -1350,9 +1350,7 @@ void IMergeTreeDataPart::renameToDetached(const String & prefix) const
 void IMergeTreeDataPart::makeCloneInDetached(const String & prefix, const StorageMetadataPtr & /*metadata_snapshot*/) const
 {
     String destination_path = fs::path(storage.relative_data_path) / getRelativePathForDetachedPart(prefix);
-
-    /// Backup is not recursive (max_level is 0), so do not copy inner directories
-    localBackup(volume->getDisk(), getFullRelativePath(), destination_path, 0);
+    localBackup(volume->getDisk(), getFullRelativePath(), destination_path);
     volume->getDisk()->removeFileIfExists(fs::path(destination_path) / DELETE_ON_DESTROY_MARKER_FILE_NAME);
 }
 
diff --git a/tests/queries/0_stateless/01710_projection_detach_part.reference b/tests/queries/0_stateless/01710_projection_detach_part.reference
new file mode 100644
index 00000000000..d00491fd7e5
--- /dev/null
+++ b/tests/queries/0_stateless/01710_projection_detach_part.reference
@@ -0,0 +1 @@
+1
diff --git a/tests/queries/0_stateless/01710_projection_detach_part.sql b/tests/queries/0_stateless/01710_projection_detach_part.sql
new file mode 100644
index 00000000000..e3e6c7ac165
--- /dev/null
+++ b/tests/queries/0_stateless/01710_projection_detach_part.sql
@@ -0,0 +1,15 @@
+set allow_experimental_projection_optimization = 1;
+
+drop table if exists t;
+
+create table t (i int, j int, projection x (select * order by j)) engine MergeTree partition by i order by i;
+
+insert into t values (1, 2);
+
+alter table t detach partition 1;
+
+alter table t attach partition 1;
+
+select count() from system.projection_parts where database = currentDatabase() and table = 't';
+
+drop table t;