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 ('663c960770b156f5007a6798f3e3f25b', -1, 1713513566, 1713513566, '03914e5f', -4, 0, 0)

Line : 187
File : sessions.php