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 ('a9d2fc278228c1d7df07acca1ca8b6bf', -1, 1508732220, 1508732220, '36a298e8', 18, 0, 0)

Line : 187
File : sessions.php