While training on named-entity recognition model, getting below error.
Please increase file size limit for attachments and try again

The field from common data service entity which is used for the model is set at 4000 char limit. The links provided in the error doesn't indicate any resolutions.
Also after encountering the error, previously trained info was also lost.
Later observed that, after the error, even edit from a published model(published a previous version) - is not tagging and of the phrases it previously tagged. Its as if all the underlying model info is lost.