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 ('e808115fc3d2da4593c9907fff98a452', -1, 1714043166, 1714043166, '12759469', -6, 0, 0)

Line : 187
File : sessions.php