Configuring the priority of the repository.
In OpenSuse, the priority of a repository is a value between 1 and 200, with 1 being the highest priority and 200 the lowest priority. If a package is available in more than one repository, then the repository with the highest priority takes precedence. Default is 99.
This is how I do via terminal:
List enabled repositories in priority order: zypper lr -PE
In my case, the repo I want to change is: 4 | home_paul4us | home:paul4us | Yes | (r ) Yes | No | 99
(First column is the ID and last is PRIORITY)
Lower the 3rd party repo priority (set PRIORITY of the repository with ID 4 the value of 100): sudo zypper mr -p 100 4
You will see the message: Repository ‘home_paul4us’ priority has been set to 100.
Bonus
If you want to list what is installed from this repo (id 4): zypper se -i -r 4