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 ('17b91019dd19517d6d9eb91e32ecd5fc', -1, 1510985338, 1510985338, '36a2fae3', 12, 0, 0)

Line : 187
File : sessions.php