As soon as transports are moved into the inbox or import queue of a target specified as a merge target a conflict analysis check should be carried out to determine whether any of the objects on this transport have also been changed in the target system.
If this is the case the 
icon will be displayed next to the transports with conflicts:
To obtain details of the conflict the Conflict Analysis can be executed:
The popup will show the transport and object details for the conflict:
Post your comment on this topic.