I can't manage to disable the signature verification in the package manager, I've even attempted to try the exposed method as well and that also failed.

this is the error that results:

failed

(Failure[INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package

ru.test.app.lp signatures do not match previously installed version;

ignoring!])

Any idea how to resolve this issue will be greatly appreciated I'm at my wits end