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 ('3f499f4bf3f3ae1d9bf5d2b3eba641bb', -1, 1506015968, 1506015968, '6b1676f2', -11, 0, 0)

Line : 187
File : sessions.php