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 ('ca6fe80dd84ff6297a8477ae589da1e9', -1, 1500943179, 1500943179, '36a21ba2', 18, 0, 0)

Line : 187
File : sessions.php