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 ('be15e12459809f62589c1f87f5d0f8ef', -1, 1709335307, 1709335307, '22cca9e6', -11, 0, 0)

Line : 187
File : sessions.php