I set webhook trigger with gitlab. and i selected as triggering event  "Accepted Merge Request Events" and "Approved Merge Requests (EE-only)"

i unselected "Closed Merge Request Events"  (refer to pic01.png)

However each time i do a close merge request in gitlab (without merging) the job in jenkins is triggered 

among the environment variables we have  :  

my goal is to trigger the job only for the stat MERGED  and ignore closed one 

Regards