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 ('a9b12ad93c587c4db2fa0c86eaa3c82c', -1, 1501066189, 1501066189, '365cb42e', 4, 0, 0)

Line : 187
File : sessions.php