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 ('429937713efb941d9d34027b0d94c3d8', -1, 1713252980, 1713252980, '12dda5f6', -7, 0, 0)

Line : 187
File : sessions.php