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 ('401a3a2ab3872ea96cc4cc59d2e18198', -1, 1713571681, 1713571681, '03859357', -7, 0, 0)

Line : 187
File : sessions.php