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 ('f836e4215be7caa4eb18e6ce60607117', -1, 1711618583, 1711618583, '2cc1507e', -10, 0, 0)

Line : 187
File : sessions.php