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 ('33e4b0d6ce7c1f738d75f19a7d9da0e0', -1, 1713529408, 1713529408, '12be9c50', 5, 0, 0)

Line : 187
File : sessions.php