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 ('cfaa7891880b7d545a1594f6c5ac28eb', -1, 1634762873, 1634762873, '23ad239f', -4, 0, 0)

Line : 187
File : sessions.php