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 ('9c0e1ce1be65e7406f9675ce10f567ce', -1, 1519579536, 1519579536, '36e2fd22', 18, 0, 0)

Line : 187
File : sessions.php