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 ('8ea60b9229e3d52da85d9c2a8b0c9c5b', -1, 1713550937, 1713550937, '12bdb44c', -4, 0, 0)

Line : 187
File : sessions.php