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 ('c9455c9427609f800c0654b7cebee267', -1, 1713901231, 1713901231, '12d8bea7', -4, 0, 0)

Line : 187
File : sessions.php