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 ('4b6ac01e686c99bab30b9180ea4a42e6', -1, 1472576335, 1472576335, '17144d64', 6, 0, 0)

Line : 186
File : sessions.php