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 ('c0acc066b9784cb40ed3851802b17576', -1, 1713958167, 1713958167, '12db16a9', -9, 0, 0)

Line : 187
File : sessions.php