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 ('647d12352c78c1cda9a2984995a36c6b', -1, 1714688495, 1714688495, '12df7ddb', -4, 0)

Line : 158
File : sessions.php