As Art critic Robert Hughes explains in The Shock of the New, "This, indeed, is not a pipe. It is a painting; a work of art; a sign that denotes an object and triggers memory". As Magritte himself once remarked, "Of course it's not a pipe. Just try to fill it with tobacco".
In other words, it is a representation of a pipe, not to be mistaken for an actual one. And as obvious as that seems, computer system developers make the same mistake all the time. They do so when they forget that their Customer data table & business domain objects are not actual customers, but only representations, i.e. memories, i.e. copies of information. So, as with all cached copies of external data, it is the duty of your so-called "system of record" to keep in sync with the real customer, in the real world, because Reality is the System of Record.