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 ('6187bcfbe1c5e85e39d5972dc50df09f', -1, 1749522767, 1749522767, 'd849d830', 2, 0, 0)

Line : 190
File : sessions.php