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 ('674b5d49f0c95b8a76d749a1ee7c5dac', -1, 1713471513, 1713471513, '038ac842', -4, 0, 0)

Line : 187
File : sessions.php