diff --git a/src/poetry/core/packages/dependency.py b/src/poetry/core/packages/dependency.py
index f5f559a85..b0dc4e37b 100644
--- a/src/poetry/core/packages/dependency.py
+++ b/src/poetry/core/packages/dependency.py
@@ -357,7 +357,7 @@ def deactivate(self) -> None:
         self._activated = False
 
     def with_constraint(self: T, constraint: str | VersionConstraint) -> T:
-        dependency = self.clone()
+        dependency = self.clone_shallow()
         dependency.constraint = constraint  # type: ignore[assignment]
         return dependency
 
diff --git a/src/poetry/core/packages/package.py b/src/poetry/core/packages/package.py
index ddd63564a..6df142c01 100644
--- a/src/poetry/core/packages/package.py
+++ b/src/poetry/core/packages/package.py
@@ -469,7 +469,7 @@ def without_dependency_groups(self: T, groups: Collection[str]) -> T:
         """
         Returns a clone of the package with the given dependency groups excluded.
         """
-        package = self.clone()
+        package = self.clone_shallow()
 
         for group_name in groups:
             if group_name in package._dependency_groups:
@@ -481,7 +481,8 @@ def without_optional_dependency_groups(self: T) -> T:
         """
         Returns a clone of the package without optional dependency groups.
         """
-        package = self.clone()
+        package = self.clone_shallow()
+        package._dependency_groups = package._dependency_groups.copy()
 
         for group_name, group in self._dependency_groups.items():
             if group.is_optional():
@@ -500,7 +501,8 @@ def with_dependency_groups(
 
         If `only` is set to True, then only the given groups will be selected.
         """
-        package = self.clone()
+        package = self.clone_shallow()
+        package._dependency_groups = package._dependency_groups.copy()
 
         for group_name, group in self._dependency_groups.items():
             if (only or group.is_optional()) and group_name not in groups:
diff --git a/src/poetry/core/packages/specification.py b/src/poetry/core/packages/specification.py
index 8dd8ed06e..fd23ce208 100644
--- a/src/poetry/core/packages/specification.py
+++ b/src/poetry/core/packages/specification.py
@@ -167,8 +167,11 @@ def is_same_package_as(self, other: PackageSpecification) -> bool:
     def clone(self: T) -> T:
         return copy.deepcopy(self)
 
+    def clone_shallow(self: T) -> T:
+        return copy.copy(self)
+
     def with_features(self: T, features: Iterable[str]) -> T:
-        package = self.clone()
+        package = self.clone_shallow()
 
         package._features = frozenset(
             canonicalize_name(feature) for feature in features