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 ('7641ed22dcf68aa05f243efc62aee4db', -1, 1467392819, 1467392819, '36a2bb09', -1, 0, 0)

Line : 187
File : sessions.php