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 ('9f4d639b83766eb348c7c9f93785397c', -1, 1503018121, 1503018121, '36a26ff7', 25, 0, 0)

Line : 211
File : sessions.php