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 ('0a7fc7b9e57579d3790b8fff8dc3601b', -1, 1711648761, 1711648761, '36a3dd85', 5, 0, 0)

Line : 187
File : sessions.php