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 ('2c9c97d1580f7215e813ee648ef3cf4d', -1, 1713582005, 1713582005, '12bfca48', -8, 0, 0)

Line : 187
File : sessions.php