PGP how to change passphrase?

Question

Data synchronization

There is a public, private and passphrase for key actions and two programs GNU privacy assistant and gpg4usb (a stripped down version of the first).
So, when changing the passphrase in the first one, this does not affect the second and generally text version of the keys, and they continue to work. Those. an encrypted message arrives and with the help of two keychains, in different programs using different passwords , they can be opened.
Thus, password changes are a sham.

Perhaps there should be some kind of synchronization of programs with the server, however, attempts to contact most of the servers were unsuccessful.
The task is to make the old password invalid.
What are some ideas?