Option to Update Custom Instructions in Ongoing Conversations

I often like to continue my older conversations with ChatGPT. Unfortunately, this means that any updates I make to custom instructions become outdated in those older conversations. In contrast, I would prefer an option to have ChatGPT update to using the latest custom instructions I’ve configured.

I’m OK with keeping the previous history of that older conversation (generated using older custom instructions). Going forward, I would just like ChatGPT to answer my new questions with the latest custom instructions.

Could you please implement this option?