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 ('c7676f9e5a1e65a0051954f4ac3fb80b', -1, 1548220432, 1548220432, '12cdf6ee', -9, 0, 0)

Line : 187
File : sessions.php