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 ('3803dac32e3cfff2b4010389a4ceb78a', -1, 1713565769, 1713565769, '12778b32', -4, 0, 0)

Line : 187
File : sessions.php