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 ('7d79feab9a3b8edb1da8cb0e49a059cc', -1, 1529485162, 1529485162, '365c9662', 18, 0, 0)

Line : 187
File : sessions.php