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 ('54afe4ce2fc36fee7ccfa0ac055e86a8', -1, 1503386002, 1503386002, '369c5c8a', 4, 0, 0)

Line : 187
File : sessions.php