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 ('5d6821fb2e8968681fed0d6c2eef7206', -1, 1713487051, 1713487051, '12dfcd3d', 2, 0, 0)

Line : 187
File : sessions.php