The validation that the label and description can’t be identical was only added relatively recently (T212869), and there may still be items in Wikidata which violate it (it’s only validated when the label or description are edited). There are also other kinds of validation which apply to new edits, but not to existing data, which could probably cause similar issues (e.g. T289417).

Ok, I understand .... is there a plan to run a bot over the data to fix this issue, like removing the description?

Not as far as I’m aware… that would presumably be up to the Wikidata community rather than the dev team.

Do you know someone that has a bot account that runs long updates? ... I can write the pywikibot script .... but I would avoid going through all the approval process ....

I tried this to identify some, but as expected is does not scale:

https://query.wikidata.org/#select%20%3Fs%20where%20%7B%0A%3Fs%20rdfs%3Alabel%20%3Flabel%20.%0A%3Fs%20schema%3Adescription%20%3Flabel%20.%0A%7D%20limit%201

At least I could found them for the properties, they are pretty frequent

https://query.wikidata.org/#select%20%3Fs%20where%20%7B%0A%3Fs%20rdfs%3Alabel%20%3Flabel%20.%0A%3Fs%20schema%3Adescription%20%3Flabel%20.%0A%3Fs%20%3Fp%20%20wikibase%3AProperty%0A%7D