public void updateCheckoutCopy() throws IOException {
		if (!isCheckOutCopy) {
			throw new IOException("Database is not a checkout copy");
		}
		synchronized (syncObject) {
			(new File(dbDir, CUMULATIVE_CHANGE_FILENAME)).delete();
			(new File(dbDir, CUMULATIVE_MODMAP_FILENAME)).delete();
		}
	}
If a cumulative change files exists, it will be deleted.
@throws IOException
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/db/PrivateDatabase.java