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 ('06050edff5ef61ddc8ea4c51838895be', -1, 1711625860, 1711625860, '22c97a96', -4, 0, 0)

Line : 187
File : sessions.php