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 ('b946424616069abc3c4217ed0af6ea0b', -1, 1730419788, 1730419788, '03914af9', 2, 0, 0)

Line : 195
File : sessions.php