phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO piranha_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('7f3760457d6ec564c8acd9c68abd7b82', -1, 1711629626, 1711629626, '2cc940ee', 1, 0, '0', '0')

Line : 175
File : sessions.php