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 ('3c41ebb4a3944b18ad791a2afa9b2346', -1, 1487957084, 1487957084, '3692b8d2', -4, 0, 0)

Line : 172
File : sessions.php