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 ('4fed0e5125af5a7ea2f1781f2f4ae574', -1, 1711656092, 1711656092, '345b54db', -9, 0, 0)

Line : 187
File : sessions.php