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 ('f2e29eb4b9f016689af78d3eacb9ae28', -1, 1711646252, 1711646252, '36e27e26', -4, 0, 0)

Line : 187
File : sessions.php