Thanks for your answer. I have already contacted the WPML SAT but it is a very slow task. I opened the thread a couple of days ago and just today they have connected and they still have not been able to give me an explanation. In this sense I am a little disappointed.
For my part, I have begun to test an infinite number of things and I am sure that it is a matter of the equivalence between attributes that for some reason gives an error. When exporting the product in CSV, the field that generates an error returns it empty.
If I deactivate the Woocommerce multilanguage plugin, it allows me to modify the attribute and does not generate erroneous equivalences, but I am afraid that there is some kind of inconsistency on the other hand.
Right now I’m a bit desperate because I have the web in production without being able to sell for two days ??
