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 ('9989dd89d0e2fd5f76c06b6a78b84ddf', -1, 1713503923, 1713503923, '12dc3b45', -7, 0, 0)

Line : 187
File : sessions.php