diff --git a/news/2956.feature.md b/news/2956.feature.md
new file mode 100644
index 0000000000..cef2f0fc2a
--- /dev/null
+++ b/news/2956.feature.md
@@ -0,0 +1,2 @@
+Use `tool.pdm.resolution` table when calculating the content hash of project file, previously only `overrides` table was used.
+This will change the hash already stored in the lockfile, so bump the lockfile version to `4.4.2`.
diff --git a/src/pdm/project/lockfile.py b/src/pdm/project/lockfile.py
index 79be8e5562..74fde4535a 100644
--- a/src/pdm/project/lockfile.py
+++ b/src/pdm/project/lockfile.py
@@ -32,7 +32,7 @@ class Compatibility(enum.IntEnum):
 
 
 class Lockfile(TOMLBase):
-    spec_version = parse_version("4.4.1")
+    spec_version = parse_version("4.4.2")
 
     @cached_property
     def default_strategies(self) -> set[str]:
diff --git a/src/pdm/project/project_file.py b/src/pdm/project/project_file.py
index a308675bf9..3b10cd2f6b 100644
--- a/src/pdm/project/project_file.py
+++ b/src/pdm/project/project_file.py
@@ -2,7 +2,6 @@
 
 import hashlib
 import json
-import warnings
 from typing import Any, Mapping
 
 from tomlkit import TOMLDocument, items
@@ -70,13 +69,6 @@ def resolution(self) -> Mapping[str, Any]:
 
     @property
     def allow_prereleases(self) -> bool | None:
-        if "allow_prereleases" in self.settings:  # pragma: no cover
-            warnings.warn(
-                "'tool.pdm.allow_prereleases' is deprecated, use 'tool.pdm.resolution.allow-prereleases' instead.",
-                FutureWarning,
-                stacklevel=3,
-            )
-            return self.settings["allow_prereleases"]
         return self.resolution.get("allow-prereleases")
 
     def content_hash(self, algo: str = "sha256") -> str:
@@ -89,7 +81,7 @@ def content_hash(self, algo: str = "sha256") -> str:
             "dev-dependencies": self.settings.get("dev-dependencies", {}),
             "optional-dependencies": self.metadata.get("optional-dependencies", {}),
             "requires-python": self.metadata.get("requires-python", ""),
-            "overrides": self.resolution.get("overrides", {}),
+            "resolution": self.resolution,
         }
         pyproject_content = json.dumps(dump_data, sort_keys=True)
         hasher = hashlib.new(algo)