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 ('9656e1a64a5e0d72da13a0295e096fb1', -1, 1713577326, 1713577326, '0310d463', -11, 0, 0)

Line : 187
File : sessions.php