[Resolved] How to remove strings

Problem:
I have just updated the WPML plugins followed by the latest WordPress update.
Thereafter, I wanted to translate a property from the original language (English) to the translation (Spanish) but suddenly I see I have to translate 60% whereas before I had 100% translated of this property. I see that the new fields to translate are other plugins or elements from the backoffice that don´t need translation such as admin_texts_wpseo_titles, WordPress or Admin Columns found in the string translation.

Can you please advise how to remove these strings or fields from the Advanced Editor so we don´t need to translate these fields?
Solution:
If you want to check the specific fields for that particular page, you can mark the "Show "Multilingual Content Setup" meta box on post edit screen." checkbox in WPML -> Settings -> Custom Fields Translation, save, and then visit your post again.

This will enable the 'multilingual content setup' at the bottom of the edition page. There you can check what fields are being used on the page and what are their translation preferences. Some of them might not appear, so you need to click on the 'show system fields' link.

Then, you can choose 'don't translate' for the translation preferences, or 'copy' if you want a value is copied to the second language version.
Relevant Documentation:
https://wpml.org/documentation/getting-started-guide/translating-custom-fields/