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 ('4c7c56d61bb0329da3904038b89f7bb8', -1, 1508509676, 1508509676, '36514902', 25, 0, 0)

Line : 211
File : sessions.php