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 ('195a6fb9b40677dab0c6b39865a52485', -1, 1711716660, 1711716660, '12d11f26', -10, 0, 0)

Line : 187
File : sessions.php