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 ('9ffae2f1f58056f4d7a1c0a7e41e0971', -1, 1490589619, 1490589619, '36ccfc25', 30, 0, 0)

Line : 189
File : sessions.php