GitLab: You are not allowed to force push code to a protected branch on this project.

remote: GitLab: You are not allowed to force push code to a protected branch on this project.

To  
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 

 Master分支被保护：

进入项目gitlab 网页版: 设置（setting）-版本库（repo） -- 保护分支（把保护的分支选择 unprotected）