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 ('3f8f4c0c8dfb0e3e18430d941d1f3376', -1, 1746221928, 1746221928, '12bf69a1', -10, 0, 0)

Line : 187
File : sessions.php