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 ('c327f2a613abf848c7d78da87b40a8e8', -1, 1713527601, 1713527601, '12e2a6d6', 2, 0, 0)

Line : 187
File : sessions.php