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 ('a5d46caa6f7a5947215e37a7834d861b', -1, 1713456359, 1713456359, '12ddd0b7', -4, 0, 0)

Line : 187
File : sessions.php