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 ('22b0dd9c34eb4f54d3192dfba24f9c6c', -1, 1709514176, 1709514176, '03ecdf6a', 4, 0, 0)

Line : 187
File : sessions.php