[Closed] fix issue when rolling back to old translation

Background of the issue:
See initial ticket : https://wpml.org/forums/topic/translations-of-roll-back-version-do-not-work-anymore/
I am trying to roll back to an old translation version for my website pages. I was advised to delete _icl_lang_duplicate_of from post meta, but I have no entry for page ID 52219 (FR version), 53454 (DE), or 411217 (IT). The initial ticket can be seen here: https://wpml.org/forums/topic/translations-of-roll-back-version-do-not-work-anymore/. The issue can be seen on this page: hidden link.

Symptoms:
When I try to roll back the DE or IT versions to an old version with the correct translation, the content is overwritten by the French version. Both the page admin and the front office show French content instead of the expected German or Italian translations.

Questions:
Why is the content overwritten by the French version when rolling back?
How can I successfully roll back to the old translation version without losing the correct language content?