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 ('abf7cea95d2481c061ca4e711b002432', -1, 1635424333, 1635424333, '22ecbf68', 6, 0, 0)

Line : 187
File : sessions.php