Error: Failed to synchronize cache for repo ... (that changes with the next try)

edit

 DNF version: 4.1.0                                                                                                                                                                                                                         
cachedir: /var/cache/dnf                                                                                                                                                                                                                   
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-cisco-openh264.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                  
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-testing-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-testing-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-testing-modular.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-testing.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-testing.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates-testing.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora-updates.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                         
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                                 
Unknown configuration value: failovermethod=priority in /etc/yum.repos.d/fedora.repo; Configuration: OptionBinding with id "failovermethod" does not exist                                                                                 
repo: using cache for: vondruch-doublecmd                                                                                                                                                                                                  
not found other for: Copr repo for doublecmd owned by vondruch                                                                                                                                                                             
not found modules for: Copr repo for doublecmd owned by vondruch                                                                                                                                                                           
not found deltainfo for: Copr repo for doublecmd owned by vondruch                                                                                                                                                                         
not found updateinfo for: Copr repo for doublecmd owned by vondruch                                                                                                                                                                        
vondruch-doublecmd: using metadata from Wed 06 Mar 2019 07:27:13 AM CET.                                                                                                                                                                   
repo: using cache for: fedora-cisco-openh264                                                                                                                                                                                               
not found other for: Fedora 29 openh264 (From Cisco) - x86_64                                                                                                                                                                              
not found modules for: Fedora 29 openh264 (From Cisco) - x86_64                                                                                                                                                                            
not found updateinfo for: Fedora 29 openh264 (From Cisco) - x86_64                                                                                                                                                                         
fedora-cisco-openh264: using metadata from Wed 12 Sep 2018 04:23:26 PM CEST.                                                                                                                                                               
Fedora ...