Colour problem

Hello everyone i am new to the forum i am having some issues with my machine i was printing fine before but now my machine is print either more of megenta or yellow...Please how can i fix this issue

 

what kind of press is it ?
model , age , plate are made by ctp ?
do you have any pre-inking proccess ?
give us some data to work on or simply turn the inker svrews down or lick less from the inkduct...

 

As Meny said, give us some more info so we can understand what is happening.