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 ('c7366e9613867e59a2a1e6aeacb3b4d5', -1, 1709027202, 1709027202, '2cd24d49', -11, 0, 0)

Line : 187
File : sessions.php