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 ('f4b0f979355d3d696d11b1eed4690f45', -1, 1524455111, 1524455111, '6b1630f3', 15, 0, 0)

Line : 187
File : sessions.php