Mirroring Gitolite slave using GitLab

Error message on pushing changes to newly created project in GitLab:
$ git push -u origin dev-A
Counting objects: 3, done.
Writing objects: 100% (3/3), 290 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
remote:
remote:
remote: Commit: 40bf8f48369530151244e2f43ae11ed44ba3ec15
remote: Returning result 0
remote: FATAL: W any project1 id_rsa DENIED by fallthru
remote: (or you mis-spelled the reponame)
remote: fatal: Could not read from remote repository.
remote:
remote: Please make sure you have the correct access rights
remote: and the repository exists.
To git@gitlab.abc.com:demogroup/project1.git
 * [new branch]      dev-A -> dev-A
Branch dev-A set up to track remote branch dev-A from origin.
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Ran below command on the GitLab server from where 'git push --mirror gitolite@mirror:repo_name.git' command is run as part of post-receive hook
sh-4.1$ ssh gitolite@mirror info
hello id_rsa, this is gitolite@mirror running gitolite3 (unknown) on git 1.8.3.1
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Main Git server:
[ec2-user@slave1 ~]$ ssh gitolite@git_server info
hello ec2-user, this is gitolite@git_server running gitolite3 v3.04-13-gcc9727c-dt on git 1.7.1
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