What is a known error database?
A known error database (KEDB) is the ITIL record of problems whose root cause has been identified, together with any workaround, so that future incidents matching the same cause can be recognised and resolved faster. Each known error entry links back to the problem record and the RCA that established the cause, lists the affected services or configuration items, and is closed only when a permanent fix is in place. In practice most KEDBs decay because entries are written by hand and never linked to new incidents. A KEDB stays useful when every accepted RCA automatically creates or updates an entry and every new incident is matched against it.
Onepane populates a known error and recurrence register from every accepted RCA and links each new incident to prior ones.