AssertionError: MMCV==1.4.0 is used but incompatible.

[xudh1991]

Sorry, expert. I'm here again
This is an environmental issue that I have encountered in many projects using mmcv and mmdet3d, but none of them have been resolved. I would like to ask if experts have any suggestions or if it is possible to release a complete Python package version
the error:

The problem lies here. If I upgrade to the MMCV version now, there will be many package exceptions. If I don't upgrade to the MMCV version, there will be MMDET3D exceptions

Sorry, if you have time, I would appreciate your help or advice