phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9f8f8fdf0fff721639dbdc8383dab8f3', -1, 1550730328, 1550730328, '22e48f0d', 15, 0, 0)

Line : 189
File : sessions.php