If one character in a deed changes, its cryptographic fingerprint changes.
IPFS does not file a document under a folder the issuer controls. It names the file by a content identifier derived from the bytes. Change a date, a boundary, a signature page, and the name changes. The old name still refers to the old bytes. Nothing is quietly overwritten.
That is the whole breakthrough, and it is small on purpose. A buyer, a lender, an insurer, an auditor or a regulator can take the document they were sent, hash it on their own machine, and see whether it matches the identifier sitting next to the token. Trust in the data room is replaced by a check anyone can run.