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 ('7db6839549ed618d2c78fac77470a9fc', -1, 1714027594, 1714027594, '12d904ce', -10, 0, 0)

Line : 187
File : sessions.php