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 ('ca8f3e9c56a8e78c81adcc3da6fc2b5f', -1, 1526976068, 1526976068, '36c45659', 4, 0, 0)

Line : 187
File : sessions.php