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 ('e6b6ef6f9d97441d200aa05a6522b5c9', -1, 1713881972, 1713881972, '12de4598', -4, 0, 0)

Line : 187
File : sessions.php