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 ('b9a7a86f65998f9bcfb4e1b2cbd8ed75', -1, 1503059314, 1503059314, '3651471f', 6, 0, 0)

Line : 189
File : sessions.php