How spring cloud config use local property override remote property

spring:
  profiles: default
  cloud:
    config:
      allowOverride: true
      overrideNone: true
      server:
        bootstrap: true
        git:
          uri: file://${user.home}/config


 both should reside on config server side, and if I understand correctly, spring.cloud.config.allow-override=true allows system properties from client side to override config server values right?

The problem I'm facing now is I'm trying to have a local prop on config client side to override the same prop from config server, let's say

config server:

key=valueA
In which file (like bootstrap.properties, application.properties or else) should I put on client side

key=valueB
so that client will use valueB for this key? Yes

--------------------
define following properties in git repo (as a source for config-server) [for given profile]:
  spring.cloud.config:
    overrideSystemProperties: false
    overrideNone: true

keep in mind properties (especially overrideSystemProperties & overrideNone) in bootsrap.yml are overriden by those from config-server by default

spring:
  cloud:
    config:
      allowOverride: true
      overrideNone: true
      overrideSystemProperties: false