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 ('f76dd01980f56d009176ae8f8c39d1e8', -1, 1713505968, 1713505968, '12e02056', 0, 0, 0)

Line : 187
File : sessions.php