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 ('83ab6d57e7f954ab2d0ee9ae6071a53b', -1, 1714058778, 1714058778, '0d3b88aa', -7, 0, 0)

Line : 187
File : sessions.php