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 ('a5c304cb545b529b78a01be9a3c3d18c', -1, 1714455751, 1714455751, '12dc88a5', -4, 0)

Line : 158
File : sessions.php