phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('91b02ff42a97f9a3e7f0c2dfbc5f7c13', -1, 1713903739, 1713903739, '03119aab', 2, 0, 0)

Line : 187
File : sessions.php