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 ('ea93bab2b0e609d6904402fd9b05b156', -1, 1714023956, 1714023956, '12e2fb16', 5, 0, 0)

Line : 187
File : sessions.php