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 ('c948eb5b7a60c62e4a189a6fb16bb8d6', -1, 1526975228, 1526975228, '36c45659', -1, 0, 0)

Line : 187
File : sessions.php