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 ('21883771c97a31b2ee14d3d8a71f53e9', -1, 1713254316, 1713254316, '03131f49', -7, 0, 0)

Line : 187
File : sessions.php