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 ('2ef8e37d58638151d50b87699c0ee05f', -1, 1540271635, 1540271635, '36e0387e', 8, 0, 0)

Line : 187
File : sessions.php