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 ('2341aae924ef1f3b99e3b90f18f3a4d6', -1, 1713494947, 1713494947, '038d1ff0', -7, 0, 0)

Line : 187
File : sessions.php