diff --git a/sea-orm-codegen/src/entity/transformer.rs b/sea-orm-codegen/src/entity/transformer.rs
index 20f8047c..ceeb8cf9 100644
--- a/sea-orm-codegen/src/entity/transformer.rs
+++ b/sea-orm-codegen/src/entity/transformer.rs
@@ -154,7 +154,7 @@ impl EntityTransformer {
                     RelationType::HasMany
                 };
                 rel.rel_type = rel_type;
-                rel.ref_table = table_name.clone();
+                rel.ref_table = table_name.to_string();
                 rel.columns = Vec::new();
                 rel.ref_columns = Vec::new();
                 if let Some(vec) = inverse_relations.get_mut(&ref_table) {
diff --git a/sea-orm-macros/src/strum/mod.rs b/sea-orm-macros/src/strum/mod.rs
index 5f9c7072..dcf048d1 100644
--- a/sea-orm-macros/src/strum/mod.rs
+++ b/sea-orm-macros/src/strum/mod.rs
@@ -1,4 +1,6 @@
 //! Source code adapted from https://github.com/Peternator7/strum
 
+#![allow(dead_code)]
+
 pub mod enum_iter;
 pub mod helpers;
diff --git a/src/executor/select.rs b/src/executor/select.rs
index 493f861f..774895e4 100644
--- a/src/executor/select.rs
+++ b/src/executor/select.rs
@@ -1054,8 +1054,8 @@ where
                 } else {
                     acc.insert(key, vec![value]);
                 }
-            } else if acc.get(&key).is_none() {
-                acc.insert(key, vec![]);
+            } else {
+                acc.entry(key).or_default();
             }
 
             acc