phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO dentereclong_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('9172e186575af2f7a1a7023c9e4c8bac', -1, 1711630444, 1711630444, '03ee3e7c', -1, 0, '0', '0')

Line : 175
File : sessions.php