There was an error running gitlab-ctl reconfigure: execute[clear the gitlab-rails cache] (gitlab::gitlab-rails line 403) had an error: Mixlib::ShellOut::ShellCommandFailed:

There was an error running gitlab-ctl reconfigure:

execute[clear the gitlab-rails cache] (gitlab::gitlab-rails line 403) had an error: Mixlib::ShellOut::ShellCommandFailed:
Expected process to exit with [0], but received '1'                                                                        
---- Begin output of /opt/gitlab/bin/gitlab-rake cache:clear ----                                                          
STDOUT:                                                                                                                    
STDERR: rake aborted!                                                                                                      
Psych::SyntaxError: (<unknown>): mapping values are not allowed in this context at line 42 column 32                       
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:5:in `<top (required)>'                        
/opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:11:in `<top (required)>'                                   
/opt/gitlab/embedded/bin/bundle:23:in `load'                                                                               
/opt/gitlab/embedded/bin/bundle:23:in `<main>'                                                                             
Tasks: TOP => cache:clear => cache:clear:redis => environment                                                              
(See full trace by running task with --trace)                                                                              
---- End output of /opt/gitlab/bin/gitlab-rake cache:clear ----                                                            
Ran /opt/gitlab/bin/gitlab-rake cache:clear returned 1