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 ('935f6e1637725131771c7dd9e2ef5c83', -1, 1508665762, 1508665762, '36a298e8', 17, 0, 0)

Line : 187
File : sessions.php