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 ('adac8dcb1f8baf8b718e118cd8f7711b', -1, 1709015196, 1709015196, '03ec9199', -8, 0, 0)

Line : 187
File : sessions.php