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 ('d466f98d8875f95d5776e3874d2aadfd', -1, 1713525612, 1713525612, '12bd9114', -4, 0, 0)

Line : 187
File : sessions.php