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 ('a2a6f85e3bc8f6dbe8ecebfa102c2235', -1, 1711692539, 1711692539, '36a27cc1', -10, 0, 0)

Line : 187
File : sessions.php