I am handling one of our first data deletion requests since moving to Odoo.

As part of this, the customer has records that are tied to metrics and data in the system so was going to redact/remove data across all the records so that we had the records kept, but nothing personal about the customer. (Issues in handling the lead, poor follow up, issue handling service etc, hence the deletion request).

Tricky thing is that when removing personal data from the records, it is recorded as a change in the chatter, which in essence is capturing it...

I'd like to retain the original records for tracking the problem and issue, but can't see anyway to do that without inadvertently retaining the data in the chatter. 

Any tips regarding this?

(I am not a dev, nor do I have backend access, so only frontend recommendations if possible).