GPT doesn't remember history after deleting and restoring the archive

1. I clicked “archive chat history” and it disappeared. After 2 hours, the chat didn’t remember anything anymore. Archiving means deleting the data.
2. I restored the history by clicking on every conversation for 30 days and even after 24 hours, the chat does not remember the conversations.
3. I asked him to go back to the old conversations, so he started making up facts.

In my language (Polish) “archive” means saving data and placing them in an important, protected place. I noticed that in English it means deleting data (?).