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 ('3df3de0e688c9186d4439f75dfe07a42', -1, 1508489721, 1508489721, '36a29a5b', 0, 0, 0)

Line : 189
File : sessions.php