diff --git a/.patches/spconv.patch b/.patches/spconv.patch
new file mode 100644
index 000000000..112ee9a6f
--- /dev/null
+++ b/.patches/spconv.patch
@@ -0,0 +1,82 @@
+--- /mmdet3d/models/layers/spconv/overwrite_spconv/write_spconv2.py
++++ /mmdet3d/models/layers/spconv/overwrite_spconv/write_spconv2.py.corrected
+@@ -1,9 +1,6 @@
+ # Copyright (c) OpenMMLab. All rights reserved.
+-import itertools
+-from typing import List, OrderedDict
+ 
+ from mmengine.registry import MODELS
+-from torch.nn.parameter import Parameter
+ 
+ 
+ def register_spconv2() -> bool:
+@@ -44,69 +41,4 @@ def register_spconv2() -> bool:
+         MODELS._register_module(SubMConv3d, 'SubMConv3d', force=True)
+         MODELS._register_module(SubMConv4d, 'SubMConv4d', force=True)
+         SparseModule._version = 2
+-        SparseModule._load_from_state_dict = _load_from_state_dict
+         return True
+-
+-
+-def _load_from_state_dict(self, state_dict: OrderedDict, prefix: str,
+-                          local_metadata: dict, strict: bool,
+-                          missing_keys: List[str], unexpected_keys: List[str],
+-                          error_msgs: List[str]) -> None:
+-    """Rewrite this func to compat the convolutional kernel weights between
+-    spconv 1.x in MMCV and 2.x in spconv2.x.
+-
+-    Kernel weights in MMCV spconv has shape in (D,H,W,in_channel,out_channel) ,
+-    while those in spcon2.x is in (out_channel,D,H,W,in_channel).
+-    """
+-    version = local_metadata.get('version', None)
+-    for hook in self._load_state_dict_pre_hooks.values():
+-        hook(state_dict, prefix, local_metadata, strict, missing_keys,
+-             unexpected_keys, error_msgs)
+-
+-    local_name_params = itertools.chain(self._parameters.items(),
+-                                        self._buffers.items())
+-    local_state = {k: v.data for k, v in local_name_params if v is not None}
+-
+-    for name, param in local_state.items():
+-        key = prefix + name
+-        if key in state_dict:
+-            input_param = state_dict[key]
+-
+-            # Backward compatibility: loading 1-dim tensor from
+-            # 0.3.* to version 0.4+
+-            if len(param.shape) == 0 and len(input_param.shape) == 1:
+-                input_param = input_param[0]
+-            if version != 2:
+-                dims = [len(input_param.shape) - 1] + list(
+-                    range(len(input_param.shape) - 1))
+-                input_param = input_param.permute(*dims)
+-            if input_param.shape != param.shape:
+-                # local shape should match the one in checkpoint
+-                error_msgs.append(
+-                    f'size mismatch for {key}: copying a param with '
+-                    f'shape {key, input_param.shape} from checkpoint,'
+-                    f'the shape in current model is {param.shape}.')
+-                continue
+-
+-            if isinstance(input_param, Parameter):
+-                # backwards compatibility for serialized parameters
+-                input_param = input_param.data
+-            try:
+-                param.copy_(input_param)
+-            except Exception:
+-                error_msgs.append(
+-                    f'While copying the parameter named "{key}", whose '
+-                    f'dimensions in the model are {param.size()} and whose '
+-                    f'dimensions in the checkpoint are {input_param.size()}.')
+-        elif strict:
+-            missing_keys.append(key)
+-
+-    if strict:
+-        for key, input_param in state_dict.items():
+-            if key.startswith(prefix):
+-                input_name = key[len(prefix):]
+-                input_name = input_name.split(
+-                    '.', 1)[0]  # get the name of param/buffer/child
+-                if input_name not in self._modules \
+-                        and input_name not in local_state:
+-                    unexpected_keys.append(key)
diff --git a/Dockerfile b/Dockerfile
index 582582c76..c837c4904 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -77,6 +77,7 @@ COPY .patches/mmengine.patch /tmp/mmengine.patch
 RUN cd $(python -c "import site; print(site.getsitepackages()[0])") \
   && git apply < /tmp/mmdet3d.patch \
   && git apply < /tmp/mmengine.patch \
+  && git apply < /tmp/spconv.patch \
   && rm -rf /tmp/* \
   && cd /
 
diff --git a/projects/PTv3/engines/test.py b/projects/PTv3/engines/test.py
index 0bf7a6caf..f06e989bc 100644
--- a/projects/PTv3/engines/test.py
+++ b/projects/PTv3/engines/test.py
@@ -70,13 +70,12 @@ def build_model(self):
             checkpoint = torch.load(self.cfg.weight, weights_only=False)
             weight = OrderedDict()
             for key, value in checkpoint["state_dict"].items():
-                if not key.startswith("module."):
-                    key = "module." + key  # xxx.xxx -> module.xxx.xxx
-                # Now all keys contain "module." no matter DDP or not.
-                if self.keywords in key:
-                    key = key.replace(self.keywords, self.replacement, 1)
-                if comm.get_world_size() == 1:
-                    key = key[7:]  # module.xxx.xxx -> xxx.xxx
+                if key.startswith("module."):
+                    if comm.get_world_size() == 1:
+                        key = key[7:]  # module.xxx.xxx -> xxx.xxx
+                else:
+                    if comm.get_world_size() > 1:
+                        key = "module." + key  # xxx.xxx -> module.xxx.xxx
                 weight[key] = value
             model.load_state_dict(weight, strict=True)
             self.logger.info("=> Loaded weight '{}' (epoch {})".format(self.cfg.weight, checkpoint["epoch"]))