Enable a disabled repository

localhost:/etc/zypp/repos.d # zypper lr
Repository priorities are without effect. All enabled repositories share the same priority.

# | Alias                             | Name                              | Enabled | GPG Check | Refresh
--+-----------------------------------+-----------------------------------+---------+-----------+--------
1 | Basesystem-Module_15.2-0          | Basesystem-Module 15.2-0          | Yes     | (r ) Yes  | No
2 | Live-Patching_15.2-0              | Live-Patching 15.2-0              | No      | ----      | ----
3 | SLES15-SP2-15.2-0                 | SLES15-SP2-15.2-0                 | No      | ----      | ----
4 | Server-Applications-Module_15.2-0 | Server-Applications-Module 15.2-0 | No      | ----      | ----
5 | Web-Scripting-Module_15.2-0       | Web-Scripting-Module 15.2-0       | No      | ----      | ----


localhost:/etc/zypp/repos.d # zypper mr -e SLES15-SP2-15.2-0
Repository 'SLES15-SP2-15.2-0' has been successfully enabled.


localhost:/etc/zypp/repos.d # zypper lr
Repository priorities in effect:                                                        (See 'zypper lr -P' for details)
      99 (default priority) :  1 repository
     100 (lowered priority) :  1 repository

# | Alias                             | Name                              | Enabled | GPG Check | Refresh
--+-----------------------------------+-----------------------------------+---------+-----------+--------
1 | Basesystem-Module_15.2-0          | Basesystem-Module 15.2-0          | Yes     | (r ) Yes  | No
2 | Live-Patching_15.2-0              | Live-Patching 15.2-0              | No      | ----      | ----
3 | SLES15-SP2-15.2-0                 | SLES15-SP2-15.2-0                 | Yes     | (r ) Yes  | No
4 | Server-Applications-Module_15.2-0 | Server-Applications-Module 15.2-0 | No      | ----      | ----
5 | Web-Scripting-Module_15.2-0       | Web-Scripting-Module 15.2-0       | No      | ----      | ----