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 ('b19c8233196b49a85d96f62c0f7b7996', -1, 1713557728, 1713557728, '0391177b', -11, 0, 0)

Line : 187
File : sessions.php