corrupt file error when creating a project using sdlxliff files downloaded from RWS language cloud

I get the following error for a batch of sdlxliff files downloaded from RWS language cloud, when creating a Trados project using a sdlxliff file:
The error given for converting the translatable file is: corrupt file: mismatching information for reference file uid='0' for file id="
Our method worked just fine since we installed Trados 2021, and we will continue working in this way. How can we fix this permanently? 
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