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 ('2eb1d6da2710bfe7f75710e4c79e3d3f', -1, 1713503517, 1713503517, '1276c888', -4, 0, 0)

Line : 187
File : sessions.php