phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1142 INSERT command denied to user 'horizonm'@'localhost' for table 'phpbb_sessions'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('732b174667d95dd5bb288e33130e19f9', -1, 1547624686, 1547624686, '36d1ca7b', 5, 0, 0)

Line : 173
File : sessions.php