Please update immediately. The process requires three steps:
Update to XRPL 3.2.1
Wait 1–2 min, confirm xrpld is running - it does not need to be in status full or proposing
Restart xrpld again - very important
Step 3 is required: the first shutdown still runs the old code and writes cached manifests to disk. Only a restart under 3.2.1 clears them.
Release Details: https://github.com/XRPLF/rippled/releases/tag/3.2.1
Reason for the fix
Nodes previously accepted, stored and re-broadcast an unlimited number of manifests from unknown validator keys. We now cap them at 100, never persist them to disk, no longer relay them onward, and drop oversized manifest messages instead of dropping the peer connection.