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 ('4a96a3c77d2aea0f461483f520d01304', -1, 1748800365, 1748800365, '0388119a', -2, 0, 0)

Line : 190
File : sessions.php