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 ('48fa44baf1c7bbbc96196e482a3f92eb', -1, 1714415539, 1714415539, '1276e269', 7, 0)

Line : 158
File : sessions.php