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 ('e969f8e79731e1d84b980ab4778f2839', -1, 1713586228, 1713586228, '0390711e', -4, 0, 0)

Line : 187
File : sessions.php