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 ('5e9b61c6e8086e36b5c92f6bcd807ff0', -1, 1540105130, 1540105130, '36a6cfdf', 2, 0, 0)

Line : 187
File : sessions.php