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 ('ad887a6ca6c8fb9932ea00d1d70a3fb3', -1, 1711718689, 1711718689, '2cc01074', -10, 0, 0)

Line : 187
File : sessions.php