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 ('232dc0d0ee6d0b455159ee5264b83815', -1, 1713560943, 1713560943, '12dd5521', -8, 0, 0)

Line : 187
File : sessions.php