Merging contributors


I have a repository in which i commit from 2 differents places.

On my 2 computers the username was correct so i had no problem pushing to remote. but on one of the computer the email was not correctly set.

In the commit list , i have no problem and all the commits appears to be linked to the correct user. (probably thanks to the username) but in the “graph” area the commits are split into 2 users :

The user set in gitlab is as follow :

The correct email is the name is Olivier and the username is oroger.

Is there a way to see only one user in the graph view ? Is it possible to merge olivier@localhost.localdomain into (the username was the same)