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 ('d888304c9384c5c9bf1a0eea84ad3f70', -1, 1714009450, 1714009450, '03918fef', -9, 0, 0)

Line : 187
File : sessions.php