error AssertionErrorHow can I solve it?

[123456com1]

Traceback (most recent call last):
File "D:\pythonxuexi\yolo11-gaijin\ultralytics-main\ultralytics-main\ultralytics\nn\modules\main.py", line 13, in
layer = DCNv4(channels=16, kernel_size=3, stride=1, padding=1, dilation=1, groups=1).to(device)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\Anaconda\envs\DL\Lib\site-packages\dcnv4-1.0.0.post2-py3.12-win-amd64.egg\DCNv4\modules\dcnv4.py", line 63, in init
assert _d_per_group % 16 == 0
AssertionError，How can I solve it?