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 ('a6f91816d03c87b8d6719e23b9cdc154', -1, 1713417466, 1713417466, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php