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 ('fa3e1312b03e0da6e9d58263ac7d859d', -1, 1714009858, 1714009858, '12776f09', 2, 0, 0)

Line : 187
File : sessions.php