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 ('4da3624c01c44c158a69d2dd198c27d8', -1, 1713997594, 1713997594, '12dc516a', -7, 0, 0)

Line : 187
File : sessions.php