Hello Mohamed,
To add new fields to the Elasticsearch index you need to modify the index mapping as it
configured with "dynamic=strict", which throws an error when adding not declared fields to the index. There is a
configuration file in the source code that represents the Elasticsearch mapping, however, this configuration file is processed to create the real mapping based on the AtoM configuration (languages enabled, etc.), so it's not a full representation of the final mapping in Elasticsearch.
From your error message, it looks like you're adding new translatable fields to the QubitInformationObject (arcnumberDesc, hightDesc). These i18n fields are added automatically to the Elasticsearch index mapping when it's (re)created, so you shouldn't need to modify the configuration file manually, just run the search populate task (from your AtoM folder):
php symfony search:populate
Please, let us know if that works.
Best regards.