Statements MUST be treated as immutable: once a statement is published it MUST NOT be republished with the same
statementID and different property values. The
replacesStatements property can be used to indicate that one statement should be considered as a replacement for one or more previous statements.
Therefore, if a particular value needs to be updated, a new statement with a new
statementID MUST be published and the
replacesStatements property used to reference the old, out-of-date statement.