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 ('95e8ecc6a9b2d2027e690cf324428898', -1, 1760602917, 1760602917, 'd849d86a', 2, 0, 0)

Line : 172
File : sessions.php