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 ('25aec95f8d8b33770a74053c606c3e09', -1, 1713268519, 1713268519, '12db706f', 4, 0, 0)

Line : 187
File : sessions.php