Error - Git Push on Bitbucket

[GBE]

Hello, 
I'm facing on this issue, without undertand why, after running push command : 

>git push -u origin master
fatal: Authentication failed for 'http://atlasjira6:7991/scm/mas/maskingset.git/'

My profil has permission access on the project and the git repository present on Bitbucket.
The information 'user.name" and "user.email" are set into the file /.git/config.

Moreover, when I try the test using LDAP connection, all results display "succeeded".

How can I resolve this issue ?

Regards, 

Pauline ERNST

[Gonchik Tsymzhitov]

Looks like you original push used the another public key.

please, do git --verbose push