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) VALUES ('1a21bd1f90cc9a7ca67ca3d79ec9871c', -1, 1714696402, 1714696402, '12df20e6', 20, 0)

Line : 158
File : sessions.php