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 ('ca87835b5b96bd60b2973fd7f77f780a', -1, 1711672323, 1711672323, '2cc32fe3', -4, 0, 0)

Line : 187
File : sessions.php