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 ('066ae39e9732e97225e199d604a9fcb8', -1, 1713914461, 1713914461, '038fa8ac', 0, 0, 0)

Line : 187
File : sessions.php