I'm attempting to export data from one CDS environment (production) to another (development). When attempting to export a built-in CDS column (Accounts) I'm getting this error:
I can't find much on what this is, I'm assuming it's a bug on MS end?
Could you please share a bit more about the error message within your CDS environment?
How do you export data from your CDS environment? Via click the "Export data" option within your Accounts Entity?
I have made a test on my side, and don't have the issue that you mentioned. The screenshot as below:
Please take a try to clear cache of your browser, and then export your CDS data again, then check if the issue is solved.
In addition, as an alternative solution, you could consider take a try to create a new solution within your PowerApps, then click "Add existing" -> Entity option to add your Accounts Entity into this solution, after that, export this solution from your Production environment, and import it into your Development environment. Then then CDS entity would be imported into your Development environment.
More details about exporting, importing solution within PowerApps, please check the following article: