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 ('8c2115f1c68e06d4ded494c8c12f3e79', -1, 1714618543, 1714618543, '03100f95', 3, 0, 0)

Line : 187
File : sessions.php