I've got it from @Alex T⚜️ . The following is the code used by UNA.

INSERT INTO `sys_seo_uri_rewrites` (`id`, `uri_orig`, `uri_rewrite`) VALUES
(1, 'view-group-profile', 'g'),
(2, 'view-persons-profile', 'u'),
(3, 'view-organization-profile', 'o'),
(4, 'item', 'i'),
(5, 'view-post', 'p'),
(6, 'view-discussion', 'd'),
(7, 'view-event-profile', 'e'),
(9, 'view-project-profile', 'project');